Cervical spinal nerve 5
|Cervical spinal nerve|
The plan of the cervical and brachial plexuses.
The spinal cord with spinal nerves.
It originates from the spinal column from above the cervical vertebra 5 (C5). It contributes to the phrenic nerve, long thoracic nerve, and dorsal scapular nerve before joining cervical spinal nerve 6 to form the upper trunk, a trunk of the brachial plexus, which then forms the lateral cord, and finally the musculocutaneous nerve.