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<span class="vector-toc-numb">1.4</span> <span>Variation</span> </div> </a> <ul id="toc-Variation-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Function" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Function"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Function</span> </div> </a> <button aria-controls="toc-Function-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Function subsection</span> </button> <ul id="toc-Function-sublist" class="vector-toc-list"> <li id="toc-Arm_2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Arm_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Arm</span> </div> </a> <ul id="toc-Arm_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Forearm_2" 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class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Clinical significance subsection</span> </button> <ul id="toc-Clinical_significance-sublist" class="vector-toc-list"> <li id="toc-Injury" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Injury"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Injury</span> </div> </a> <ul id="toc-Injury-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Assessment" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Assessment"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Assessment</span> </div> </a> <ul id="toc-Assessment-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Additional_images" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Additional_images"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Additional images</span> </div> </a> <ul id="toc-Additional_images-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span 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Available in 24 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-24" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">24 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B9%D8%B5%D8%A8_%D9%85%D8%AA%D9%88%D8%B3%D8%B7" title="عصب متوسط – Arabic" lang="ar" hreflang="ar" data-title="عصب متوسط" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Nervi_medi%C3%A0" title="Nervi medià – Catalan" lang="ca" hreflang="ca" data-title="Nervi medià" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/St%C5%99edov%C3%BD_nerv" title="Středový nerv – Czech" lang="cs" hreflang="cs" data-title="Středový nerv" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Nervus_medianus" title="Nervus medianus – Danish" lang="da" hreflang="da" data-title="Nervus medianus" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Nervus_medianus" title="Nervus medianus – German" lang="de" hreflang="de" data-title="Nervus medianus" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Nervio_mediano" title="Nervio mediano – Spanish" lang="es" hreflang="es" data-title="Nervio mediano" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B9%D8%B5%D8%A8_%D9%85%D8%AF%DB%8C%D9%86" title="عصب مدین – Persian" lang="fa" hreflang="fa" data-title="عصب مدین" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Nerf_m%C3%A9dian" title="Nerf médian – French" lang="fr" hreflang="fr" data-title="Nerf médian" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Nervio_mediano" title="Nervio mediano – Galician" lang="gl" hreflang="gl" data-title="Nervio mediano" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A0%95%EC%A4%91%EC%8B%A0%EA%B2%BD" title="정중신경 – Korean" lang="ko" hreflang="ko" data-title="정중신경" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Nervo_mediano" title="Nervo mediano – Italian" lang="it" hreflang="it" data-title="Nervo mediano" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A2%D7%A6%D7%91_%D7%94%D7%AA%D7%95%D7%95%D7%9A" title="עצב התווך – Hebrew" lang="he" hreflang="he" data-title="עצב התווך" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Nervus_medianus" title="Nervus medianus – Latin" lang="la" hreflang="la" data-title="Nervus medianus" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Vidurinis_nervas" title="Vidurinis nervas – Lithuanian" lang="lt" hreflang="lt" data-title="Vidurinis nervas" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Nervus_medianus" title="Nervus medianus – Dutch" lang="nl" hreflang="nl" data-title="Nervus medianus" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%AD%A3%E4%B8%AD%E7%A5%9E%E7%B5%8C" title="正中神経 – Japanese" lang="ja" hreflang="ja" data-title="正中神経" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Nerw_po%C5%9Brodkowy" title="Nerw pośrodkowy – Polish" lang="pl" hreflang="pl" data-title="Nerw pośrodkowy" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Nervo_mediano" title="Nervo mediano – Portuguese" lang="pt" hreflang="pt" data-title="Nervo mediano" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Keskihermo" title="Keskihermo – Finnish" lang="fi" hreflang="fi" data-title="Keskihermo" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Nervus_medianus" title="Nervus medianus – Swedish" lang="sv" hreflang="sv" data-title="Nervus medianus" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AA%E0%B9%89%E0%B8%99%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%AA%E0%B8%B2%E0%B8%97%E0%B8%A1%E0%B8%B5%E0%B9%80%E0%B8%94%E0%B8%B5%E0%B8%A2%E0%B8%99" title="เส้นประสาทมีเดียน – Thai" lang="th" hreflang="th" data-title="เส้นประสาทมีเดียน" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Median_sinir" title="Median sinir – Turkish" lang="tr" hreflang="tr" data-title="Median sinir" data-language-autonym="Türkçe" data-language-local-name="Turkish" 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searchaux" style="display:none">Nerve of the upper limb</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><tbody><tr><th colspan="2" class="infobox-above" style="background-color:lemonchiffon">Median nerve</th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Nerves_of_the_left_upper_extremity.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Nerves_of_the_left_upper_extremity.gif/250px-Nerves_of_the_left_upper_extremity.gif" decoding="async" width="250" height="477" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Nerves_of_the_left_upper_extremity.gif/375px-Nerves_of_the_left_upper_extremity.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Nerves_of_the_left_upper_extremity.gif/500px-Nerves_of_the_left_upper_extremity.gif 2x" data-file-width="524" data-file-height="1000" /></a></span><div class="infobox-caption">Diagram from <a href="/wiki/Gray%27s_anatomy" class="mw-redirect" title="Gray's anatomy">Gray's anatomy</a>, depicting the peripheral nerves of the <a href="/wiki/Upper_extremity" class="mw-redirect" title="Upper extremity">upper extremity</a>, amongst others the median nerve</div></td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #efefef">Details</th></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em">From</th><td class="infobox-data"><a href="/wiki/Lateral_cord" title="Lateral cord">Lateral cord</a> and <a href="/wiki/Medial_cord" title="Medial cord">medial cord</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em">Innervates</th><td class="infobox-data"><a href="/wiki/Anterior_compartment_of_the_forearm" title="Anterior compartment of the forearm">Anterior compartment of the forearm</a> (with two exceptions), <a href="/wiki/Thenar_eminence" title="Thenar eminence">thenar eminence</a>, <a href="/wiki/Lumbricals_of_the_hand" title="Lumbricals of the hand">lumbricals</a>, skin of the hand</td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #efefef">Identifiers</th></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em"><a href="/wiki/Latin" title="Latin">Latin</a></th><td class="infobox-data"><i>nervus medianus</i></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em"><a href="/wiki/Medical_Subject_Headings" title="Medical Subject Headings">MeSH</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://meshb.nlm.nih.gov/record/ui?ui=D008475">D008475</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em"><a href="/wiki/Terminologia_Anatomica" title="Terminologia Anatomica">TA98</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://ifaa.unifr.ch/Public/EntryPage/TA98%20Tree/Entity%20TA98%20EN/14.2.03.031%20Entity%20TA98%20EN.htm">A14.2.03.031</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em"><a href="/wiki/Terminologia_Anatomica" title="Terminologia Anatomica">TA2</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://ta2viewer.openanatomy.org/?id=6459">6459</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:0.25em"><a href="/wiki/Foundational_Model_of_Anatomy" title="Foundational Model of Anatomy">FMA</a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://bioportal.bioontology.org/ontologies/FMA/?p=classes&conceptid=http%3A%2F%2Fpurl.org%2Fsig%2Font%2Ffma%2Ffma14385">14385</a></td></tr><tr><td colspan="2" class="infobox-below"><a href="/wiki/Anatomical_terms_of_neuroanatomy" title="Anatomical terms of neuroanatomy">Anatomical terms of neuroanatomy</a><div style="text-align: right;"><small class="noprint">[<a href="https://www.wikidata.org/wiki/Q1364876" class="extiw" title="d:Q1364876">edit on Wikidata</a>]</small></div></td></tr></tbody></table> <p>The <b>median nerve</b> is a <a href="/wiki/Nerve" title="Nerve">nerve</a> in humans and other animals in the upper limb. It is one of the five main nerves originating from the <a href="/wiki/Brachial_plexus" title="Brachial plexus">brachial plexus</a>. </p><p>The median nerve originates from the lateral and medial cords of the brachial plexus,<sup id="cite_ref-:0_1-0" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and has contributions from ventral roots of <a href="/wiki/Cervical_spinal_nerve" class="mw-redirect" title="Cervical spinal nerve">C6-C7</a> (lateral cord) and <a href="/wiki/Cervical_spinal_nerve_8" title="Cervical spinal nerve 8">C8</a> and <a href="/wiki/Thoracic_spinal_nerve_1" title="Thoracic spinal nerve 1">T1</a> (medial cord).<sup id="cite_ref-:0_1-1" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:1_2-0" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>The median nerve is the only nerve that passes through the <a href="/wiki/Carpal_tunnel" title="Carpal tunnel">carpal tunnel</a>. <a href="/wiki/Carpal_tunnel_syndrome" title="Carpal tunnel syndrome">Carpal tunnel syndrome</a> is the disability that results from the median nerve being pressed in the carpal tunnel. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Structure">Structure</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=1" title="Edit section: Structure"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The median nerve arises from the branches from <a href="/wiki/Lateral_cord" title="Lateral cord">lateral</a> and <a href="/wiki/Medial_cord" title="Medial cord">medial cords</a> of the <a href="/wiki/Brachial_plexus" title="Brachial plexus">brachial plexus</a>, courses through the anterior part of arm, forearm, and hand, and terminates by supplying the muscles of the hand. </p> <div class="mw-heading mw-heading3"><h3 id="Arm">Arm</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=2" title="Edit section: Arm"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>After receiving inputs from both the lateral and medial cords of the <a href="/wiki/Brachial_plexus" title="Brachial plexus">brachial plexus</a>, the median nerve enters the arm from the <a href="/wiki/Axilla" title="Axilla">axilla</a> at the inferior margin of the <a href="/wiki/Teres_major" class="mw-redirect" title="Teres major">teres major</a> muscle. It then passes vertically down and courses lateral to the brachial artery between <a href="/wiki/Biceps_brachii" class="mw-redirect" title="Biceps brachii">biceps brachii</a> (above) and <a href="/wiki/Brachialis" class="mw-redirect" title="Brachialis">brachialis</a> (below). At first, it is lateral to the artery and lies anterior to the shoulder joint; it then crosses anteriorly to run medial to the artery in the distal arm and into the <a href="/wiki/Cubital_fossa" title="Cubital fossa">cubital fossa</a>. Inside the <a href="/wiki/Cubital_fossa" title="Cubital fossa">cubital fossa</a>, the median nerve passes medial to the <a href="/wiki/Brachial_artery" title="Brachial artery">brachial artery</a>.<sup id="cite_ref-:0_1-2" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The median nerve gives off an articular branch to the elbow joint. A branch to <a href="/wiki/Pronator_teres" class="mw-redirect" title="Pronator teres">pronator teres</a> muscle arise from the median nerve immediately above the elbow joint.<sup id="cite_ref-BD_Chaurasia_2010_3-0" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Forearm">Forearm</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=3" title="Edit section: Forearm"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The median nerve continues in the cubital fossa medial to the brachial artery and passes between the two heads of the pronator teres, deep to the <a href="/wiki/Bicipital_aponeurosis" title="Bicipital aponeurosis">bicipital aponeurosis</a> (<a href="/wiki/Aponeurosis" title="Aponeurosis">aponeurosis</a> of biceps) and superficial the brachialis muscle. It crosses the <a href="/wiki/Ulnar_artery" title="Ulnar artery">ulnar artery</a> (branch of brachial artery) while being separated by the deep head of the pronator teres. It then travels between the <a href="/wiki/Flexor_digitorum_superficialis" class="mw-redirect" title="Flexor digitorum superficialis">flexor digitorum superficialis</a> (above) and <a href="/wiki/Flexor_digitorum_profundus" class="mw-redirect" title="Flexor digitorum profundus">flexor digitorum profundus</a> (below). The median nerve is accompanied by the <a href="/wiki/Median_artery" title="Median artery">median artery</a> (a branch of <a href="/wiki/Anterior_interosseous_artery" title="Anterior interosseous artery">anterior interosseous artery</a>) during this course. Then, about 5 cm above the <a href="/wiki/Flexor_retinaculum_of_the_hand" title="Flexor retinaculum of the hand">flexor retinaculum</a> (wrist), it emerges between the <a href="/wiki/Flexor_digitorum_superficialis" class="mw-redirect" title="Flexor digitorum superficialis">flexor digitorum superficialis</a> (medially) and the <a href="/wiki/Flexor_carpi_radialis" class="mw-redirect" title="Flexor carpi radialis">flexor carpi radialis</a> (laterally) into the hand.<sup id="cite_ref-BD_Chaurasia_2010_3-1" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>The main trunk of the median nerve innervates the superficial and deep groups of the muscles in the anterior compartment of the forearm with the exception of <a href="/wiki/Flexor_carpi_ulnaris" class="mw-redirect" title="Flexor carpi ulnaris">flexor carpi ulnaris</a>. The median nerve does this by giving off two branches as it courses through the forearm: </p> <ul><li><i>Muscular branches</i> are given off in the <a href="/wiki/Cubital_fossa" title="Cubital fossa">cubital fossa</a> to supply <a href="/wiki/Flexor_carpi_radialis" class="mw-redirect" title="Flexor carpi radialis">flexor carpi radialis</a>, <a href="/wiki/Palmaris_longus" class="mw-redirect" title="Palmaris longus">palmaris longus</a>, and flexor digitorum superficialis.<sup id="cite_ref-BD_Chaurasia_2010_3-2" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li>The <i><a href="/wiki/Anterior_interosseous_branch" class="mw-redirect" title="Anterior interosseous branch">anterior interosseous branch</a></i> is given off in the upper part of the forearm,<sup id="cite_ref-:2_4-0" class="reference"><a href="#cite_note-:2-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> courses with the <a href="/wiki/Anterior_interosseous_artery" title="Anterior interosseous artery">anterior interosseous artery</a> and innervates <a href="/wiki/Flexor_pollicis_longus" class="mw-redirect" title="Flexor pollicis longus">flexor pollicis longus</a> and the lateral half of <a href="/wiki/Flexor_digitorum_profundus" class="mw-redirect" title="Flexor digitorum profundus">flexor digitorum profundus</a> (the ulnar half is supplied by ulnar nerve, as is the flexor carpi ulnaris muscle). It ends with its innervation of <a href="/wiki/Pronator_quadratus" class="mw-redirect" title="Pronator quadratus">pronator quadratus</a>. In addition to its supply to muscles, this nerve also supplies the distal radioulnar joint and wrist joint.<sup id="cite_ref-BD_Chaurasia_2010_3-3" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li></ul> <p>The median nerve also gives off sensory and other branches in the forearm. The <a href="/wiki/Palmar_cutaneous_branch" class="mw-redirect" title="Palmar cutaneous branch">palmar cutaneous branch</a> of the median nerve arises at the distal part of the forearm. It supplies sensory innervation to the <a href="/wiki/Thenar_eminence" title="Thenar eminence">thenar eminence</a> of the palm and the central palm. Articular branches are given to the elbow joint and proximal radioulnar joint. Vascular branches supply the radial and ulnar arteries. Meanwhile, a communicating branch is given to the <a href="/wiki/Ulnar_nerve" title="Ulnar nerve">ulnar nerve</a>.<sup id="cite_ref-:0_1-3" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-BD_Chaurasia_2010_3-4" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Hand">Hand</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=4" title="Edit section: Hand"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The median nerve enters the hand through the carpal tunnel, deep to the flexor retinaculum along with the <a href="/wiki/Tendon" title="Tendon">tendons</a> of <a href="/wiki/Flexor_digitorum_superficialis" class="mw-redirect" title="Flexor digitorum superficialis">flexor digitorum superficialis</a>, <a href="/wiki/Flexor_digitorum_profundus" class="mw-redirect" title="Flexor digitorum profundus">flexor digitorum profundus</a>, and <a href="/wiki/Flexor_pollicis_longus" class="mw-redirect" title="Flexor pollicis longus">flexor pollicis longus</a>. From there, it is divided into recurrent muscular branch and digital cutaneous branch:<sup id="cite_ref-BD_Chaurasia_2010_3-5" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <ul><li>The muscular branch (also known as <a href="/wiki/Recurrent_branch_of_the_median_nerve" title="Recurrent branch of the median nerve">recurrent branch</a>) supplies the thenar muscles (<a href="/wiki/Opponens_pollicis" class="mw-redirect" title="Opponens pollicis">opponens pollicis</a>, <a href="/wiki/Abductor_pollicis_brevis" class="mw-redirect" title="Abductor pollicis brevis">abductor pollicis brevis</a>, and superficial part of <a href="/wiki/Flexor_pollicis_brevis" class="mw-redirect" title="Flexor pollicis brevis">flexor pollicis brevis</a>)<sup id="cite_ref-BD_Chaurasia_2010_3-6" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li>Digital cutaneous to the <a href="/wiki/Proper_palmar_digital_branch" class="mw-redirect" title="Proper palmar digital branch">proper palmar digital branch</a> and the <a href="/wiki/Common_palmar_digital_branch" class="mw-redirect" title="Common palmar digital branch">common palmar digital branch</a>: The proper palmar digital branch gives out three digital branches to the lateral one and a half digits (two digital branches to the thumb, one digital branch to the lateral side of the index finger). The digital branch to the index finger also supplies the <a href="/wiki/Lumbricals_of_the_hand" title="Lumbricals of the hand">first lumbrical</a>. The common palmar digital branch divides further into two branches. Both the medial and lateral branches supply the second and third interdigital clefts with adjoining index, middle, and lateral half of ring finger. The lateral branch also supplies the <a href="/wiki/Lumbricals_of_the_hand" title="Lumbricals of the hand">second lumbrical</a>.<sup id="cite_ref-BD_Chaurasia_2010_3-7" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="Variation">Variation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=5" title="Edit section: Variation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The naturally occurring anomalies of the median nerve are: </p> <ul><li>Bifurcation of the median nerve typically occurs after the nerve exits the carpal tunnel; however, in a small percentage (5-10%) of individuals, the median nerve bifurcates more proximal in the carpal tunnel, wrist, or forearm.<sup id="cite_ref-Roll2011_5-0" class="reference"><a href="#cite_note-Roll2011-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></li> <li>During gestation, a median artery that serves the hand retracts. However, in some individuals, the median artery does not retract and follows the course next to the median nerve into the hand.<sup id="cite_ref-Roll2011_5-1" class="reference"><a href="#cite_note-Roll2011-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Martin_Gruber_Anastomosis" class="mw-redirect" title="Martin Gruber Anastomosis">Martin-Gruber anastomoses</a> can occur when branches of the median nerve cross-over in the forearm and merge with the ulnar nerve to innervate portions of the forehand.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li> <li><a href="/w/index.php?title=Riche-Cannieu_anastomosis&action=edit&redlink=1" class="new" title="Riche-Cannieu anastomosis (page does not exist)">Riche-Cannieu anastomosis</a> can occur when a connection exists between recurrent branch of the median nerve and deep branch of the ulnar nerve of the hand.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Function">Function</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=6" title="Edit section: Function"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The median nerve is the main nerve of the front of the <a href="/wiki/Forearm" title="Forearm">forearm</a>. It supplies the muscles of the front of the forearm and muscles of the <a href="/wiki/Thenar_eminence" title="Thenar eminence">thenar eminence</a>, thus controlling the coarse movements of the hand. Therefore, it is also called "labourer's nerve".<sup id="cite_ref-BD_Chaurasia_2010_3-8" class="reference"><a href="#cite_note-BD_Chaurasia_2010-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Arm_2">Arm</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=7" title="Edit section: Arm"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The median nerve has no voluntary motor or cutaneous function in the brachium. It gives vascular branches to the wall of the brachial artery. These vascular branches carry <a href="/wiki/Sympathetic_nervous_system" title="Sympathetic nervous system">sympathetic fibers</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Forearm_2">Forearm</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=8" title="Edit section: Forearm"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>It innervates all of the <a href="/wiki/Flexors_in_the_forearm" class="mw-redirect" title="Flexors in the forearm">flexors in the forearm</a>, except <a href="/wiki/Flexor_carpi_ulnaris" class="mw-redirect" title="Flexor carpi ulnaris">flexor carpi ulnaris</a> and that part of <a href="/wiki/Flexor_digitorum_profundus" class="mw-redirect" title="Flexor digitorum profundus">flexor digitorum profundus</a> that supplies the fourth and fifth digits.<sup id="cite_ref-:3_8-0" class="reference"><a href="#cite_note-:3-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> The latter two muscles are supplied by the <a href="/wiki/Ulnar_nerve" title="Ulnar nerve">ulnar nerve</a> (specifically the <a href="/wiki/Muscular_branches_of_ulnar_nerve" title="Muscular branches of ulnar nerve">muscular branches of ulnar nerve</a>). </p><p>The main portion of the median nerve supplies these muscles: </p><p>Superficial group: </p> <ul><li><a href="/wiki/Pronator_teres" class="mw-redirect" title="Pronator teres">Pronator teres</a><sup id="cite_ref-:1_2-1" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Flexor_carpi_radialis" class="mw-redirect" title="Flexor carpi radialis">Flexor carpi radialis</a><sup id="cite_ref-:1_2-2" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Palmaris_longus" class="mw-redirect" title="Palmaris longus">Palmaris longus</a><sup id="cite_ref-:1_2-3" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul> <p>Intermediate group: </p> <ul><li><a href="/wiki/Flexor_digitorum_superficialis_muscle" title="Flexor digitorum superficialis muscle">Flexor digitorum superficialis muscle</a><sup id="cite_ref-:1_2-4" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul> <p>The anterior interosseus branch of the median nerve supplies these muscles: </p><p>Deep group: </p> <ul><li><a href="/wiki/Flexor_digitorum_profundus" class="mw-redirect" title="Flexor digitorum profundus">Flexor digitorum profundus</a> (only the lateral half)<sup id="cite_ref-:1_2-5" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Flexor_pollicis_longus" class="mw-redirect" title="Flexor pollicis longus">Flexor pollicis longus</a><sup id="cite_ref-:1_2-6" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Pronator_quadratus" class="mw-redirect" title="Pronator quadratus">Pronator quadratus</a><sup id="cite_ref-:1_2-7" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="Hand_2">Hand</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=9" title="Edit section: Hand"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the hand, the median nerve supplies motor innervation to the <a href="/wiki/Lumbricals_of_the_hand" title="Lumbricals of the hand">first and second lumbrical</a> muscles. It also supplies the muscles of the <a href="/wiki/Thenar_eminence" title="Thenar eminence">thenar eminence</a> by a recurrent thenar branch.<sup id="cite_ref-:3_8-1" class="reference"><a href="#cite_note-:3-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> The rest of the intrinsic muscles of the hand are supplied by the ulnar nerve. </p><p>The median nerve innervates the skin of the palmar (volar) side of the <a href="/wiki/Index_finger" title="Index finger">index finger</a>, <a href="/wiki/Thumb" title="Thumb">thumb</a>, <a href="/wiki/Middle_finger" title="Middle finger">middle finger</a>, and half the <a href="/wiki/Ring_finger" title="Ring finger">ring finger</a>, and the <a href="/wiki/Nail_(anatomy)" title="Nail (anatomy)">nail bed</a>. The radial aspect of the palm is supplied by the palmar cutaneous branch of the median nerve, which leaves the nerve proximal to the <a href="/wiki/Wrist" title="Wrist">wrist</a> creases. This palmar cutaneous branch travels in a separate fascial groove adjacent to the flexor carpi radialis and then superficial to the flexor retinaculum. It is, therefore, spared in carpal tunnel syndrome. </p><p><br /> </p> <div class="mw-heading mw-heading2"><h2 id="Clinical_significance">Clinical significance</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=10" title="Edit section: Clinical significance"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Injury">Injury</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=11" title="Edit section: Injury"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Injury of median nerve at different levels causes different syndromes with varying motor and sensory deficits. </p><p><b>At the shoulder</b> </p> <ul><li>Injury can occur at the brachial plexus<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></li></ul> <p><b>Above the elbow</b> </p> <ul><li>Common mechanism of injury: a <a href="/wiki/Supracondylar_humerus_fracture" title="Supracondylar humerus fracture">supracondylar humerus fracture</a></li> <li>Motor deficit: <ul><li>Loss of <a href="/wiki/Pronation" class="mw-redirect" title="Pronation">pronation</a> of forearm, weakness in flexion of the hand at the wrist, loss of flexion of radial half of digits and thumb, loss of abduction and opposition of thumb.</li> <li>Presence of an <a href="/wiki/Ape_hand_deformity" title="Ape hand deformity">ape hand deformity</a> when the hand is at rest, due to an hyperextension of index finger and thumb, and an adducted thumb.</li> <li>Presence of <a href="/wiki/Hand_of_benediction" title="Hand of benediction">benediction sign</a> when attempting to form a fist, due to loss of flexion of radial half of digits.</li></ul></li> <li>Sensory deficit: loss of sensation in lateral <style data-mw-deduplicate="TemplateStyles:r1154941027">.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span> digits including their nail beds, and the thenar area.</li></ul> <p><b>At the elbow</b> </p> <ul><li>Entrapment at the level of the elbow or the proximal forearm could be due to the <a href="/wiki/Pronator_teres_syndrome" title="Pronator teres syndrome">pronator teres syndrome</a>.</li></ul> <p><b>Within the proximal forearm: <a href="/wiki/Anterior_interosseous_syndrome" title="Anterior interosseous syndrome">anterior interosseous syndrome</a></b> </p> <ul><li>Injury to the anterior interosseous branch in the forearm causes the <a href="/wiki/Anterior_interosseous_syndrome" title="Anterior interosseous syndrome">anterior interosseous syndrome</a><sup id="cite_ref-:2_4-1" class="reference"><a href="#cite_note-:2-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li> <li>Common mechanisms: tight cast, <a href="/wiki/Radius_(bone)" title="Radius (bone)">forearm bone</a> fracture</li> <li>Motor deficit: loss of <a href="/wiki/Pronation" class="mw-redirect" title="Pronation">pronation</a> of forearm, loss of flexion of radial half of digits and thumb</li> <li>Sensory deficit: none</li></ul> <p><b>At the wrist</b> </p> <ul><li>Common mechanism: wrist laceration</li> <li>Motor deficit: <ul><li>Weakness in flexion of radial half of digits and thumb, loss of abduction and opposition of thumb</li> <li>Presence of an <a href="/wiki/Ape_hand_deformity" title="Ape hand deformity">ape hand deformity</a> when the hand is at rest may be likely, due to an hyperextension of index finger and thumb, and an adducted thumb. Nevertheless, an ape hand deformity is not a requirement for a carpal tunnel syndrome diagnosis.</li> <li>Presence of a benediction sign when attempting to form a fist, due to weakness in flexion of radial half of digits.</li></ul></li> <li>Sensory deficit: loss of sensation in lateral <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span> digits including their nail beds, and the thenar area.</li></ul> <p><b>Within the wrist: carpal tunnel syndrome</b> </p> <ul><li>Common mechanism: <a href="/wiki/Carpal_tunnel_syndrome" title="Carpal tunnel syndrome">carpal tunnel syndrome</a>, an injury by <a href="/wiki/Nerve_compression_syndrome" title="Nerve compression syndrome">nerve compression</a> in the carpal tunnel, without transection of the median nerve, due to overuse by activities such as <a href="/wiki/Typing" title="Typing">keyboard typing</a> and <a href="/wiki/Cooking" title="Cooking">cooking</a></li> <li>Motor deficit: <ul><li>Weakness in flexion of radial half of digits and thumb, weakness in abduction and opposition of thumb</li> <li>Presence of an ape hand deformity or when attempting to form a fist, the benediction sign, due to compression of the median nerve, as opposed to complete median nerve palsy</li></ul></li> <li>Sensory deficit: numbness and tingling in lateral <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span> digits including their nail beds, but excluding the thenar eminence which is supplied by the palmar cutaneous branch of the median nerve<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Unlike in wrist laceration, sensation still occurs in the area of the central palm. Sensation is not lost because the palmar cutaneous branch runs above the <a href="/wiki/Flexor_retinaculum_of_the_hand" title="Flexor retinaculum of the hand">flexor retinaculum</a>, and is not affected in compression in <a href="/wiki/Carpal_tunnel_syndrome" title="Carpal tunnel syndrome">carpal tunnel syndrome</a>.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Assessment">Assessment</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=12" title="Edit section: Assessment"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>When symptoms of tingling, numbness, pain, or muscle weakness occur, various assessments are conducted, including patient-reported subjective surveys, provocative tests meant to elicit or exacerbate symptoms, sensory and motor function tests, and diagnostic equipment. </p> <ul><li>Common patient-reported measures of symptoms and function are the Boston Carpal Tunnel Questionnaire (BCTQ)and, its short version, the CTS-6,<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> the Disabilities of the Arm, Shoulder, and Hand (DASH),<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> and the Upper Limb Functional Index.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li>Provocative testing to examine free movement and gliding for the entire length of the median nerve is completed using an upper limb tension test. <a href="/wiki/Phalen_maneuver" title="Phalen maneuver">Phalen's</a>, <a href="/wiki/Tinel%27s_sign" title="Tinel's sign">Tinel's</a>, and Durkan's tests are used to assess compression at the wrist in the case of carpal tunnel syndrome.</li> <li>Sensory testing is conducted across the dermatomes associated with sensory functioning of the median nerve using monofilaments or two-point discrimination instruments. Motor function tests focus on examining the use of the thenar muscles within the hand most affected by median nerve injury. Common functional tests include the evaluation of grip and pinch strength using dynamometry and gross and fine motor coordination ability using the Purdue pegboard, 9-hole peg test, and other assessment tools.</li> <li>Electrodiagnostic testing using surface or needle electromyography is a widely used diagnostic assessment that can identify a specific location of nerve compression/injury or rule out other central nervous system conditions that could mimic a median nerve injury. Sonographic imaging can evaluate the median nerve's size, shape, and movement for comparison to normative values<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> and identify locations or causes of nerve compression to support intervention selection, particularly within the carpal tunnel.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup></li></ul> <p>Combinations of these assessments are useful for ruling out other conditions, identifying the location of nerve injury or compression, uncovering underlying causes of symptoms (such as tendonitis), determining the severity of the nerve injury, and developing individualized treatment plans based on patient characteristics.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Such combinations of median nerve evaluations have been most widely validated in the assessment of carpal tunnel syndrome.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Additional_images">Additional images</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=13" title="Edit section: Additional images"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sobo_1909_554.png" class="mw-file-description" title="Brachium seen anterolaterally, showing nerves and vasculature"><img alt="Brachium seen anterolaterally, showing nerves and vasculature" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Sobo_1909_554.png/59px-Sobo_1909_554.png" decoding="async" width="59" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Sobo_1909_554.png/89px-Sobo_1909_554.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/43/Sobo_1909_554.png/119px-Sobo_1909_554.png 2x" data-file-width="818" data-file-height="1652" /></a></span></div> <div class="gallerytext"><a href="/wiki/Arm" title="Arm">Brachium</a> seen anterolaterally, showing nerves and vasculature</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sobo_1909_705-706.png" class="mw-file-description" title="Antebrachium seen anteriorly, showing nerves and vasculature"><img alt="Antebrachium seen anteriorly, showing nerves and vasculature" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Sobo_1909_705-706.png/97px-Sobo_1909_705-706.png" decoding="async" width="97" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Sobo_1909_705-706.png/146px-Sobo_1909_705-706.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Sobo_1909_705-706.png/194px-Sobo_1909_705-706.png 2x" data-file-width="967" data-file-height="1195" /></a></span></div> <div class="gallerytext"><a href="/wiki/Antebrachium" class="mw-redirect" title="Antebrachium">Antebrachium</a> seen anteriorly, showing nerves and vasculature</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Braus_1921_165.png" class="mw-file-description" title="Cross-section through the middle of upper arm (left), and middle of the forearm (right)"><img alt="Cross-section through the middle of upper arm (left), and middle of the forearm (right)" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Braus_1921_165.png/120px-Braus_1921_165.png" decoding="async" width="120" height="68" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Braus_1921_165.png/180px-Braus_1921_165.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/Braus_1921_165.png/240px-Braus_1921_165.png 2x" data-file-width="1804" data-file-height="1024" /></a></span></div> <div class="gallerytext">Cross-section through the middle of upper arm (left), and middle of the forearm (right)</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Gray421.png" class="mw-file-description" title="Transverse section across distal ends of radius and ulna"><img alt="Transverse section across distal ends of radius and ulna" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Gray421.png/120px-Gray421.png" decoding="async" width="120" height="68" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Gray421.png/180px-Gray421.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/53/Gray421.png/240px-Gray421.png 2x" data-file-width="550" data-file-height="312" /></a></span></div> <div class="gallerytext">Transverse section across distal ends of radius and ulna</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Carpal-Tunnel.svg" class="mw-file-description" title="Transverse section across the wrist and digits"><img alt="Transverse section across the wrist and digits" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Carpal-Tunnel.svg/120px-Carpal-Tunnel.svg.png" decoding="async" width="120" height="73" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Carpal-Tunnel.svg/180px-Carpal-Tunnel.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Carpal-Tunnel.svg/240px-Carpal-Tunnel.svg.png 2x" data-file-width="661" data-file-height="404" /></a></span></div> <div class="gallerytext">Transverse section across the wrist and digits</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Gray809.png" class="mw-file-description" title="The right brachial plexus (infraclavicular portion) in the axillary fossa, viewed from below and in front"><img alt="The right brachial plexus (infraclavicular portion) in the axillary fossa, viewed from below and in front" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Gray809.png/120px-Gray809.png" decoding="async" width="120" height="107" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Gray809.png/180px-Gray809.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Gray809.png/240px-Gray809.png 2x" data-file-width="563" data-file-height="500" /></a></span></div> <div class="gallerytext">The right brachial plexus (infraclavicular portion) in the axillary fossa, viewed from below and in front</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Gray812and814.svg" class="mw-file-description" title="Diagram of segmental distribution of the cutaneous nerves of the right upper extremity."><img alt="Diagram of segmental distribution of the cutaneous nerves of the right upper extremity." src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Gray812and814.svg/120px-Gray812and814.svg.png" decoding="async" width="120" height="119" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Gray812and814.svg/180px-Gray812and814.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Gray812and814.svg/240px-Gray812and814.svg.png 2x" data-file-width="512" data-file-height="508" /></a></span></div> <div class="gallerytext">Diagram of segmental distribution of the cutaneous nerves of the right upper extremity.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Gray815.png" class="mw-file-description" title="Superficial palmar nerves"><img alt="Superficial palmar nerves" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Gray815.png/95px-Gray815.png" decoding="async" width="95" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Gray815.png/142px-Gray815.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Gray815.png/190px-Gray815.png 2x" data-file-width="475" data-file-height="600" /></a></span></div> <div class="gallerytext">Superficial palmar nerves</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Gray817.png" class="mw-file-description" title="Deep palmar nerves"><img alt="Deep palmar nerves" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Gray817.png/92px-Gray817.png" decoding="async" width="92" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Gray817.png/138px-Gray817.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Gray817.png/183px-Gray817.png 2x" data-file-width="459" data-file-height="600" /></a></span></div> <div class="gallerytext">Deep palmar nerves</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Gray1235_(English).svg" class="mw-file-description" title="Front of right upper extremity, showing surface markings for bones, arteries, and nerves"><img alt="Front of right upper extremity, showing surface markings for bones, arteries, and nerves" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Gray1235_%28English%29.svg/120px-Gray1235_%28English%29.svg.png" decoding="async" width="120" height="58" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Gray1235_%28English%29.svg/180px-Gray1235_%28English%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Gray1235_%28English%29.svg/240px-Gray1235_%28English%29.svg.png 2x" data-file-width="512" data-file-height="248" /></a></span></div> <div class="gallerytext">Front of right upper extremity, showing surface markings for bones, arteries, and nerves</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Slide7FFFF.JPG" class="mw-file-description" title="Median nerve"><img alt="Median nerve" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Slide7FFFF.JPG/120px-Slide7FFFF.JPG" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Slide7FFFF.JPG/180px-Slide7FFFF.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Slide7FFFF.JPG/240px-Slide7FFFF.JPG 2x" data-file-width="960" data-file-height="720" /></a></span></div> <div class="gallerytext">Median nerve</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Slide4MMMMM.JPG" class="mw-file-description" title="Median nerve"><img alt="Median nerve" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Slide4MMMMM.JPG/120px-Slide4MMMMM.JPG" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Slide4MMMMM.JPG/180px-Slide4MMMMM.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Slide4MMMMM.JPG/240px-Slide4MMMMM.JPG 2x" data-file-width="960" data-file-height="720" /></a></span></div> <div class="gallerytext">Median nerve</div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=14" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article uses <a href="/wiki/Anatomical_terminology" title="Anatomical terminology">anatomical terminology</a>.</div> <ul><li><a href="/wiki/Carpal_tunnel" title="Carpal tunnel">Carpal tunnel</a></li> <li><a href="/wiki/Cubital_fossa" title="Cubital fossa">Cubital fossa</a></li> <li><a href="/wiki/Anterior_interosseous_nerve" title="Anterior interosseous nerve">Anterior interosseous nerve</a></li> <li><a href="/wiki/Common_palmar_digital_nerves_of_median_nerve" title="Common palmar digital nerves of median nerve">Common palmar digital nerves</a></li> <li><a href="/wiki/Proper_palmar_digital_nerves_of_median_nerve" title="Proper palmar digital nerves of median nerve">Proper palmar digital nerves</a></li> <li><a href="/wiki/Recurrent_branch_of_the_median_nerve" title="Recurrent branch of the median nerve">Recurrent branch of the median nerve</a></li> <li><a href="/wiki/Brachial_plexus" title="Brachial plexus">Brachial plexus</a></li> <li><a href="/wiki/Carpal_tunnel_syndrome" title="Carpal tunnel syndrome">Carpal tunnel syndrome</a></li> <li><a href="/wiki/Median_nerve_palsy" title="Median nerve palsy">Median nerve palsy</a></li> <li><a href="/wiki/Anterior_interosseous_nerve_syndrome" class="mw-redirect" title="Anterior interosseous nerve syndrome">Anterior interosseous nerve syndrome</a></li> <li><a href="/wiki/Pronator_teres_syndrome" title="Pronator teres syndrome">Pronator teres syndrome</a></li> <li><a href="/wiki/Nerve_compression_syndrome" title="Nerve compression syndrome">Nerve compression syndrome</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Median_nerve&action=edit&section=15" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><span class="noviewer" typeof="mw:File"><span><img alt="Public domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> <i>This article incorporates text in the <a href="/wiki/Public_domain" title="Public domain">public domain</a> from <a rel="nofollow" class="external text" href="https://archive.org/stream/anatomyofhumanbo1918gray#page/938/mode/2up">page 938</a> of the 20th edition of</i> <a href="/wiki/Gray%27s_Anatomy" title="Gray's Anatomy">Gray's Anatomy</a> <i>(1918)</i> </p> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist 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ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Brachial_plexus" title="Template:Brachial plexus"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Brachial_plexus" title="Template talk:Brachial plexus"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Brachial_plexus" title="Special:EditPage/Template:Brachial plexus"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Nerve_supply_of_the_human_arm68" style="font-size:114%;margin:0 4em"><a href="/wiki/Nerve_supply_of_the_human_arm" class="mw-redirect" title="Nerve supply of the human arm">Nerve supply of the human arm</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Supraclavicular</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i>root</i> (<a href="/wiki/Dorsal_scapular_nerve" title="Dorsal scapular nerve">dorsal scapular</a>, <a href="/wiki/Long_thoracic_nerve" title="Long thoracic nerve">long thoracic</a>)</li> <li><i><a href="/wiki/Upper_trunk" title="Upper trunk">upper trunk</a></i> (<a href="/wiki/Suprascapular_nerve" title="Suprascapular nerve">suprascapular</a>, <a href="/wiki/Nerve_to_the_subclavius" class="mw-redirect" title="Nerve to the subclavius">to the subclavius</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Infraclavicular</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="lateral_cord49" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lateral_cord" title="Lateral cord">lateral cord</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lateral_pectoral_nerve" title="Lateral pectoral nerve">lateral pectoral</a> <ul><li>ansa pectoralis</li></ul></li></ul> <ul><li><a href="/wiki/Musculocutaneous_nerve" title="Musculocutaneous nerve">musculocutaneous</a> (<a href="/wiki/Lateral_cutaneous_nerve_of_forearm" title="Lateral cutaneous nerve of forearm">lateral cutaneous of forearm</a>)</li></ul> <ul><li><a class="mw-selflink selflink">median</a>/<a href="/wiki/Lateral_root_of_median_nerve" title="Lateral root of median nerve">lateral root</a>: <a href="/wiki/Anterior_interosseous_nerve" title="Anterior interosseous nerve">anterior interosseous</a></li> <li><a href="/wiki/Palmar_branch_of_the_median_nerve" title="Palmar branch of the median nerve">palmar</a></li> <li><a href="/wiki/Recurrent_branch_of_the_median_nerve" title="Recurrent branch of the median nerve">recurrent</a></li> <li><a href="/wiki/Common_palmar_digital_nerves_of_median_nerve" title="Common palmar digital nerves of median nerve">common palmar digital</a> (<a href="/wiki/Proper_palmar_digital_nerves_of_median_nerve" title="Proper palmar digital nerves of median nerve">proper palmar digital</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Medial_cord" title="Medial cord">medial cord</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Medial_pectoral_nerve" title="Medial pectoral nerve">medial pectoral</a> <ul><li>ansa pectoralis</li></ul></li></ul> <ul><li>cutaneous: <a href="/wiki/Medial_cutaneous_nerve_of_forearm" title="Medial cutaneous nerve of forearm">medial cutaneous of forearm</a></li> <li><a href="/wiki/Medial_cutaneous_nerve_of_arm" title="Medial cutaneous nerve of arm">medial cutaneous of arm</a></li></ul> <ul><li><a href="/wiki/Ulnar_nerve" title="Ulnar nerve">ulnar</a>: <a href="/wiki/Muscular_branches_of_ulnar_nerve" title="Muscular branches of ulnar nerve">muscular</a></li> <li><a href="/wiki/Palmar_branch_of_ulnar_nerve" title="Palmar branch of ulnar nerve">palmar</a></li> <li><a href="/wiki/Dorsal_branch_of_ulnar_nerve" title="Dorsal branch of ulnar nerve">dorsal</a> (<a href="/wiki/Dorsal_digital_nerves_of_ulnar_nerve" title="Dorsal digital nerves of ulnar nerve">dorsal digital nerves</a>)</li> <li><a href="/wiki/Superficial_branch_of_ulnar_nerve" title="Superficial branch of ulnar nerve">superficial</a> (<a href="/wiki/Common_palmar_digital_nerves_of_ulnar_nerve" title="Common palmar digital nerves of ulnar nerve">common palmar digital</a>, <a href="/wiki/Proper_palmar_digital_nerves_of_ulnar_nerve" title="Proper palmar digital nerves of ulnar nerve">proper palmar digital</a>)</li> <li><a href="/wiki/Deep_branch_of_ulnar_nerve" title="Deep branch of ulnar nerve">deep</a></li></ul> <ul><li><a class="mw-selflink selflink">median</a>/<a href="/wiki/Medial_root_of_median_nerve" title="Medial root of median nerve">medial root</a>: see above</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Posterior_cord" title="Posterior cord">posterior cord</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>subscapular (<a href="/wiki/Upper_subscapular_nerve" title="Upper subscapular nerve">upper</a>, <a href="/wiki/Lower_subscapular_nerve" title="Lower subscapular nerve">lower</a>)</li> <li><a href="/wiki/Thoracodorsal_nerve" title="Thoracodorsal nerve">thoracodorsal</a></li></ul> <ul><li><a href="/wiki/Axillary_nerve" title="Axillary nerve">axillary</a> (<a href="/wiki/Superior_lateral_cutaneous_nerve_of_arm" title="Superior lateral cutaneous nerve of arm">superior lateral cutaneous of arm</a>)</li></ul> <ul><li><a href="/wiki/Radial_nerve" title="Radial nerve">radial</a>: <a href="/wiki/Muscular_branches_of_the_radial_nerve" title="Muscular branches of the radial nerve">muscular</a></li> <li><i>cutaneous</i> (<a href="/wiki/Posterior_cutaneous_nerve_of_arm" title="Posterior cutaneous nerve of arm">posterior of arm</a>, <a href="/wiki/Inferior_lateral_cutaneous_nerve_of_arm" title="Inferior lateral cutaneous nerve of arm">inferior lateral of arm</a>, <a href="/wiki/Posterior_cutaneous_nerve_of_forearm" title="Posterior cutaneous nerve of forearm">posterior of forearm</a>)</li> <li><a href="/wiki/Superficial_branch_of_radial_nerve" title="Superficial branch of radial nerve">superficial</a> (<a href="/wiki/Dorsal_digital_nerves_of_radial_nerve" title="Dorsal digital nerves of radial nerve">dorsal digital nerves</a>)</li> <li><a href="/wiki/Deep_branch_of_radial_nerve" title="Deep branch of radial nerve">deep</a> (<a href="/wiki/Posterior_interosseous_nerve" title="Posterior interosseous nerve">posterior interosseous</a>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Brachial_plexus" title="Brachial plexus">Brachial plexus</a></li></ul> </div></td></tr></tbody></table></div> <style data-mw-deduplicate="TemplateStyles:r1130092004">.mw-parser-output .portal-bar{font-size:88%;font-weight:bold;display:flex;justify-content:center;align-items:baseline}.mw-parser-output .portal-bar-bordered{padding:0 2em;background-color:#fdfdfd;border:1px solid #a2a9b1;clear:both;margin:1em auto 0}.mw-parser-output .portal-bar-related{font-size:100%;justify-content:flex-start}.mw-parser-output .portal-bar-unbordered{padding:0 1.7em;margin-left:0}.mw-parser-output .portal-bar-header{margin:0 1em 0 0.5em;flex:0 0 auto;min-height:24px}.mw-parser-output .portal-bar-content{display:flex;flex-flow:row wrap;flex:0 1 auto;padding:0.15em 0;column-gap:1em;align-items:baseline;margin:0;list-style:none}.mw-parser-output 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aria-labelledby="Authority_control_databases_frameless&#124;text-top&#124;10px&#124;alt=Edit_this_at_Wikidata&#124;link=https&#58;//www.wikidata.org/wiki/Q1364876#identifiers&#124;class=noprint&#124;Edit_this_at_Wikidata1412" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Authority_control_databases_frameless&#124;text-top&#124;10px&#124;alt=Edit_this_at_Wikidata&#124;link=https&#58;//www.wikidata.org/wiki/Q1364876#identifiers&#124;class=noprint&#124;Edit_this_at_Wikidata1412" style="font-size:114%;margin:0 4em"><a href="/wiki/Help:Authority_control" title="Help:Authority control">Authority control databases</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1364876#identifiers" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" 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href="http://tools.wmflabs.org/wikidata-externalid-url/?p=1323&url_prefix=https:%2F%2Fwww.unifr.ch%2Fifaa%2FPublic%2FEntryPage%2FTA98%20Tree%2FEntity%20TA98%20EN%2F&url_suffix=%20Entity%20TA98%20EN.htm&id=A14.2.03.031">Terminologia Anatomica</a></span></li></ul></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Median_nerve&oldid=1263948180">https://en.wikipedia.org/w/index.php?title=Median_nerve&oldid=1263948180</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a 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