Accessory Nerve
| Definition: |
The 11th cranial nerve. The accessory nerve originates from neurons in the medulla and in the cervical spinal cord. It has a cranial root, which joins the vagus (10th cranial) nerve and sends motor fibers to the muscles of the larynx, and a spinal root, which sends motor fibers to the trapezius and the sternocleidomastoid muscles. Damage to the nerve produces weakness in head rotation and shoulder elevation. |
| Notes: |
neopl = ACCESSORY NERVE DISEASES (IM) + CRANIAL NERVE NEOPLASMS (IM) + histol type of neopl (IM) |
Accessory Nerve Definitions and Terms
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