accessory nerve
spinal accessory
nervus accessorius
eleventh cranial nerve

In anatomy, the accessory nerve is a nerve that controls specific muscles of the shoulder and neck.

The accessory nerve is derived from the basal plate of the embryonic spinal segments C1-C6.

In the neck, the accessory nerve crosses the internal jugular vein around the level of the posterior belly of digastric muscle.

The contribution of the 5th cervical nerve may stem from an accessory phrenic nerve.

The accessory phrenic nerve connects to the phrenic nerve in the thorax or the root of the neck.

There is anastomosis with accessory nerve, hypoglossal nerve and sympathetic trunk.

Many important structures relate to the sternocleidomastoid, including the common carotid artery, accessory nerve, and brachial plexus.

The upper branch accompanies the accessory nerve, and the lower branch arises near the origin of the occipital artery.

Only a residual swelling remained, but it was enough to squeeze the accessory nerves and disrupt all her finer sensations.

Also, the sternocleidomastoid muscle, jugular vein, and accessory nerve are to be removed if such procedure allows apparently complete tumor resection.