Cervical spinal nerve 1

{{Short description|Spinal nerve of the cervical segment}}

{{Infobox anatomy

| Name = Cervical spinal nerve

| Latin = nervi spinalis

| Image = Sobo 1909 702.png

| Caption = The plan of the cervical and brachial plexuses

| Image2 = Sobo 1909 611.png

| Caption2 = The spinal cord with spinal nerves

| System =

| Precursor =

}}

The cervical spinal nerve 1 (C1) is a spinal nerve of the cervical segment."[https://spinalcordinjuryzone.com/info/7448/nervous-system-groups-of-nerves Nervous System — Groups of Nerves]" from spinalcordinjuryzone.com. Published February 23, 2004. [https://web.archive.org/web/20111223085400/https://spinalcordinjuryzone.com/info/7448/nervous-system-groups-of-nerves Archived] Dec 23, 2011. Retrieved June 12, 2018. C1 carries predominantly motor fibres, but also a small meningeal branch that supplies sensation to parts of the dura around the foramen magnum (via dorsal rami).

It originates from the spinal column from above the cervical vertebra 1 (C1).{{cite book |last1=Saladin |first1=Kenneth S. |title=Human anatomy |date=2011 |publisher=McGraw-Hill |location=New York |isbn=9780071222075 |page=382 |edition=3rd}}

The dorsal root and ganglion of the first cervical nerve may be rudimentary or entirely absent.

Muscles innervated by this nerve are:

• Geniohyoid muscle- through hypoglossal nerve
• Rectus capitis anterior muscle
• Longus capitis muscle (partly)
• Rectus capitis lateralis muscle
• Splenius cervicis muscle (partly)
• Rectus capitis posterior major muscle
• levator scapulae muscle (partly)
• Thyrohyoid muscle – through hypoglossal nerve
• Omohyoid – through ansa cervicalis
• Sternohyoid – through ansa cervicalis
• Sternothyroid - through ansa cervicalis