About The Medical Condition Spinal Accessory Nerve
Find the definition of the medical term Spinal Accessory Nerve. Spinal Accessory Nerve defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.
Spinal Accessory Nerve
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What's The Definition Of The Medical Condition Spinal Accessory Nerve?
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.
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