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.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:dimgray; color: white">Cervical enlargement</th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Gray663.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/Gray663.png/250px-Gray663.png" decoding="async" width="250" height="710" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/6/68/Gray663.png 1.5x" data-file-width="264" data-file-height="750" /></a></span><div class="infobox-caption">Diagrams of the medulla spinalis. (Cervical enlargement labeled at upper right.)</div></td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #efefef">Details</th></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>intumescentia cervicalis</i></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/14.1.02.002%20Entity%20TA98%20EN.htm">A14.1.02.002</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=6050">6050</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%2Ffma74893">74893</a></td></tr><tr><td colspan="2" class="infobox-below"><a href="/wiki/Anatomical_terminology" title="Anatomical terminology">Anatomical terminology</a><div style="text-align: right;"><small class="noprint">[<a href="https://www.wikidata.org/wiki/Q5065333" class="extiw" title="d:Q5065333">edit on Wikidata</a>]</small></div></td></tr></tbody></table> <p>The <b>cervical enlargement</b> corresponds with the attachments of the large nerves which supply the <a href="/wiki/Upper_limbs" class="mw-redirect" title="Upper limbs">upper limbs</a>. </p><p>Located just above the <a href="/wiki/Brachial_plexus" title="Brachial plexus">brachial plexus</a>, it extends from about the fifth <a href="/wiki/Cervical_vertebrae" title="Cervical vertebrae">cervical</a> to the first <a href="/wiki/Thoracic_vertebra" class="mw-redirect" title="Thoracic vertebra">thoracic vertebra</a>, its maximum circumference (about 38 mm.) being on a level with the attachment of the sixth pair of <a href="/wiki/Cervical_nerves" class="mw-redirect" title="Cervical nerves">cervical nerves</a>. </p><p>The reason behind the enlargement of the cervical region is because of the increased neural input and output to the upper limbs. </p><p>An analogous region in the lower limbs occurs at the <a href="/wiki/Lumbar_enlargement" title="Lumbar enlargement">lumbar enlargement</a>. </p> <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=Cervical_enlargement&action=edit&section=1" 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/752/mode/2up">page 752</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> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cervical_enlargement&action=edit&section=2" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.wesnorman.com/lesson6spinalcord&coverings.htm">lesson6spinalcord&coverings</a> at The Anatomy Lesson by Wesley Norman (Georgetown University)</li> <li><a rel="nofollow" class="external text" href="http://ect.downstate.edu/courseware/haonline/labs/l02/080101.htm">Anatomy photo:02:08-0101</a> at the SUNY Downstate Medical Center - "Vertebral Canal and Spinal Cord: Regions of the Spinal Cord"</li> <li><a rel="nofollow" class="external text" href="https://www.med.umich.edu/lrc/coursepages/m1/anatomy2010/html/atlas/n3a5p3.html">Atlas image: n3a5p3</a> at the University of 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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:Spinal_cord" title="Template:Spinal cord"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Spinal_cord" title="Template talk:Spinal cord"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Spinal_cord" title="Special:EditPage/Template:Spinal cord"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Spinal_cord" style="font-size:114%;margin:0 4em"><a href="/wiki/Spinal_cord" title="Spinal cord">Spinal cord</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">General features</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 class="mw-selflink selflink">Cervical enlargement</a></li> <li><a href="/wiki/Lumbar_enlargement" title="Lumbar enlargement">Lumbar enlargement</a></li> <li><a href="/wiki/Conus_medullaris" title="Conus medullaris">Conus medullaris</a></li> <li><a href="/wiki/Filum_terminale" title="Filum terminale">Filum terminale</a></li> <li><a href="/wiki/Cauda_equina" title="Cauda equina">Cauda equina</a></li> <li><a href="/wiki/Meninges" title="Meninges">Meninges</a></li> <li><a href="/wiki/Central_canal" title="Central canal">Central canal</a> <ul><li><a href="/wiki/Terminal_ventricle" class="mw-redirect" title="Terminal ventricle">Terminal ventricle</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Grey_column" class="mw-redirect" title="Grey column">Grey columns</a></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 scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Posterior_grey_column" class="mw-redirect" title="Posterior grey column">Posterior grey column</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/Marginal_nucleus_of_spinal_cord" title="Marginal nucleus of spinal cord">Marginal nucleus</a></li> <li><a href="/wiki/Substantia_gelatinosa_of_Rolando" title="Substantia gelatinosa of Rolando">Substantia gelatinosa of Rolando</a></li> <li><a href="/wiki/Nucleus_proprius_of_spinal_cord" title="Nucleus proprius of spinal cord">Nucleus proprius</a></li> <li><a href="/wiki/Rexed_laminae" title="Rexed laminae">Rexed lamina V</a></li> <li><a href="/wiki/Rexed_laminae" title="Rexed laminae">Rexed lamina VI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lateral_grey_column" title="Lateral grey column">Lateral grey column</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/Intermediolateral_nucleus" title="Intermediolateral nucleus">Intermediolateral nucleus</a></li> <li><a href="/wiki/Posterior_thoracic_nucleus" title="Posterior thoracic nucleus">Posterior thoracic nucleus</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anterior_grey_column" class="mw-redirect" title="Anterior grey column">Anterior grey column</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/Interneuron" title="Interneuron">Interneuron</a></li> <li><a href="/wiki/Alpha_motor_neuron" title="Alpha motor neuron">Alpha motor neuron</a> <ul><li><a href="/wiki/Onuf%27s_nucleus" title="Onuf's nucleus">Onuf's nucleus</a></li></ul></li> <li><a href="/wiki/Gamma_motor_neuron" title="Gamma motor neuron">Gamma motor neuron</a></li></ul> </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" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Rexed_laminae" title="Rexed laminae">Rexed laminae</a></li> <li><a href="/wiki/Central_gelatinous_substance_of_spinal_cord" class="mw-redirect" title="Central gelatinous substance of spinal cord">Central gelatinous substance</a></li> <li><a href="/wiki/Gray_commissure" class="mw-redirect" title="Gray commissure">Gray commissure</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/White_matter" title="White matter">White matter</a></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 scope="row" class="navbox-group" style="width:1%">Sensory</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Posterior_funiculus" class="mw-redirect" title="Posterior funiculus">Posterior</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/Posterior_column-medial_lemniscus_pathway" class="mw-redirect" title="Posterior column-medial lemniscus pathway">Posterior column-medial lemniscus pathway</a></li> <li><a href="/wiki/Gracile_fasciculus" class="mw-redirect" title="Gracile fasciculus">Gracile</a></li> <li><a href="/wiki/Cuneate_fasciculus" class="mw-redirect" title="Cuneate fasciculus">Cuneate</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lateral_funiculus" title="Lateral funiculus">Lateral</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/Spinocerebellar_tract" class="mw-redirect" title="Spinocerebellar tract">Spinocerebellar</a> <ul><li><a href="/wiki/Dorsal_spinocerebellar_tract" class="mw-redirect" title="Dorsal spinocerebellar tract">dorsal</a></li> <li><a href="/wiki/Ventral_spinocerebellar_tract" class="mw-redirect" title="Ventral spinocerebellar tract">ventral</a></li></ul></li> <li><a href="/wiki/Spinothalamic_tract" title="Spinothalamic tract">Spinothalamic</a> <ul><li><a href="/wiki/Lateral_spinothalamic_tract" class="mw-redirect" title="Lateral spinothalamic tract">lateral</a></li> <li><a href="/wiki/Anterior_spinothalamic_tract" class="mw-redirect" title="Anterior spinothalamic tract">anterior</a></li></ul></li> <li><a href="/wiki/Posterolateral_tract" title="Posterolateral tract">Posterolateral</a></li> <li><a href="/wiki/Spinotectal_tract" class="mw-redirect" title="Spinotectal tract">Spinotectal</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anterior_funiculus" title="Anterior funiculus">Anterior</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/Spinoreticular_tract" title="Spinoreticular tract">Spinoreticular tract</a></li> <li><a href="/wiki/Spino-olivary_tract" title="Spino-olivary tract">Spino-olivary tract</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Motor</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lateral_funiculus" title="Lateral funiculus">Lateral</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/Pyramidal_tracts" title="Pyramidal tracts">Corticospinal</a> <ul><li><a href="/wiki/Lateral_corticospinal_tract" title="Lateral corticospinal tract">Lateral</a></li></ul></li> <li><a href="/wiki/Extrapyramidal_system" title="Extrapyramidal system">Extrapyramidal</a> <ul><li><a href="/wiki/Rubrospinal_tract" title="Rubrospinal tract">Rubrospinal</a></li> <li><a href="/wiki/Lateral_raphespinal_tract" class="mw-redirect" title="Lateral raphespinal tract">Raphespinal</a></li> <li><a href="/wiki/Reticular_formation#Descending_reticulospinal_tracts" title="Reticular formation">Reticulospinal</a></li> <li><a href="/wiki/Hypothalamospinal_tract" title="Hypothalamospinal tract">Hypothalamospinal</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anterior_funiculus" title="Anterior funiculus">Anterior</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>Corticospinal <ul><li><a href="/wiki/Anterior_corticospinal_tract" title="Anterior corticospinal tract">Anterior</a></li></ul></li> <li>Extrapyramidal <ul><li><a href="/wiki/Vestibulospinal_tract" title="Vestibulospinal tract">Vestibulospinal</a></li> <li><a href="/wiki/Reticular_formation#Descending_reticulospinal_tracts" title="Reticular formation">Reticulospinal</a></li> <li><a href="/wiki/Tectospinal_tract" title="Tectospinal tract">Tectospinal</a></li> <li><a href="/wiki/Anterior_raphespinal_tract" class="mw-redirect" title="Anterior raphespinal tract">Raphespinal</a></li> <li><a href="/wiki/Olivospinal_tract" title="Olivospinal tract">Olivospinal</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Both</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/Anterior_white_commissure" title="Anterior white commissure">Anterior white commissure</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">External features</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Ventral <ul><li><a href="/wiki/Anterior_median_fissure_of_spinal_cord" title="Anterior median fissure of spinal cord">Anterior median fissure</a></li> <li><a href="/wiki/Anterolateral_sulcus_of_spinal_cord" title="Anterolateral sulcus of spinal cord">Anterolateral sulcus</a></li></ul></li> <li>Dorsal <ul><li><a href="/wiki/Posterior_median_sulcus_of_spinal_cord" title="Posterior median sulcus of spinal cord">Posterior median sulcus</a></li> <li><a href="/wiki/Posterolateral_sulcus_of_spinal_cord" title="Posterolateral sulcus of spinal cord">Posterolateral sulcus</a></li></ul></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 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