Spinal accessory nerve (XI)

Dscn1817.jpg (81099 bytes) Dscn1818.jpg (73686 bytes) Dorsolateral view, left shoulder

The spinal accessory nerve is cranial nerve XI.  It serves the sternocleidomastoid muscle and the trapezius muscle.  We will find it on the deep side of the acromiotrapezius muscle.  Sometimes it is called the accessory nerve.

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