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{{Short description|Small branch of the brachial plexus}}
{{Infobox nerve
| Name = Subclavian nerve
| Latin = nervus subclavius
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| Image2 = Gray808.png
| Caption2 = The right brachial plexus with its short branches, viewed from in front. Subclavian nerve not visible.
| Innervates = [[
| BranchFrom = [[
| BranchTo =
}}
The '''subclavian nerve''', also known as the '''nerve to the subclavius''', is a small branch of the [[upper trunk]] of the [[brachial plexus]]. It contains [[Axon|axons]] from [[Cervical spinal nerve 5|C5]] and [[Cervical spinal nerve 6|C6]].
==
The subclavian nerve is a branch of the [[upper trunk]] of the [[brachial plexus]].<ref name=":0">{{Cite book|last=Rubin|first=Michael|title=Netter's concise neuroanatomy|date=28 September 2016|others=Netter, Frank H. (Frank Henry), 1906-1991|isbn=978-0-323-48091-8|edition=Updated|location=Philadelphia, PA|pages=310|oclc=946698976}}</ref> It contains [[Axon|axons]] derived from the [[Ventral ramus of spinal nerve|ventral rami]] of the [[Cervical spinal nerve 5|C5]] and [[Cervical spinal nerve 6|C6]] cervical [[Spinal nerve|spinal nerves]].<ref name=":0" /> ▼
=== Origin ===
▲The subclavian nerve is a branch of the [[upper trunk]] of the [[brachial plexus]]. It contains [[Axon|axons]] derived from the [[Ventral ramus of spinal nerve|ventral rami]] of the [[Cervical spinal nerve 5|C5]] and [[Cervical spinal nerve 6|C6]] cervical [[Spinal nerve|spinal nerves]].<ref name=":0">{{Cite book |last=Rubin |first=Michael |title=Netter's concise neuroanatomy |date=28 September 2016 |others=Netter, Frank H. (Frank Henry), 1906-1991 |isbn=978-0-323-48091-8 |edition=Updated |location=Philadelphia, PA |pages=310 |oclc=946698976}}</ref>
The origin is situated within the [[posterior triangle of the neck]].'''<ref name=":1">{{Cite book |last=Kadasne |first=D. K. |url=https://www.worldcat.org/oclc/682534511 |title=Kadasne's Textbook of Anatomy |publisher=Jaypee Brothers Medical Publishers |year=2009 |isbn=978-81-8448-455-7 |edition=1st |location=New Delhi |oclc=682534511}}</ref>'''
=== Course ===
Descending, it passes anterior to (the 3rd part of) the [[subclavian artery]] and [[Subclavian vein|vein]].'''<ref name=":1" />'''
=== Variation ===
==== Accessory phrenic nerve ====
The subclavian nerve may issue a branch called the accessory phrenic nerve'''<ref name=":2" /><ref name=":1" />''' which innervates the [[Thoracic diaphragm|diaphragm]].<ref name=":2">{{Cite journal|last1=Loukas|first1=Marios|last2=Kinsella|first2=Christopher R.|last3=Louis|first3=Robert G.|last4=Gandhi|first4=Sagar|last5=Curry|first5=Brian|date=November 2006|title=Surgical anatomy of the accessory phrenic nerve|journal=The Annals of Thoracic Surgery|volume=82|issue=5|pages=1870–1875|doi=10.1016/j.athoracsur.2006.05.098|issn=1552-6259|pmid=17062263}}</ref> The accessory phrenic nerve may rather branch from the C4 or C6 segments or [[ansa cervicalis]].<ref>{{Citation |last=Kayalioglu |first=Gulgun |title=The Spinal Cord |chapter= Chapter 4 - The Spinal Nerves |date=2009-01-01 |chapter-url=https://www.sciencedirect.com/science/article/pii/B9780123742476500080 |pages=37–56 |editor-last=Watson |editor-first=Charles |place=San Diego |publisher=Academic Press |language=en |isbn=978-0-12-374247-6 |access-date=2022-06-14 |editor2-last=Paxinos |editor2-first=George |editor3-last=Kayalioglu |editor3-first=Gulgun}}</ref> This nerve usually joins with the [[phrenic nerve]] before innervating the diaphragm, ventral to the [[subclavian vein]].<ref>{{Cite journal |last1=Sharma |first1=Manish S. |last2=Loukas |first2=Marios |last3=Spinner |first3=Robert J. |year=2011 |title=Accessory phrenic nerve: A rarely discussed common variation with clinical implications |url=https://onlinelibrary.wiley.com/doi/10.1002/ca.21142 |journal=Clinical Anatomy |language=en |volume=24 |issue=5 |pages=671–673 |doi=10.1002/ca.21142|pmid=21374726 |s2cid=20001098 }}</ref>
== Function ==
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[[Category:Nerves of the upper limb]]
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