Yale- Cranial Nerve 11, pg. 1 Page header & navigation buttons.

Cranial Nerve XI - Accessory Nerve Page 1 of 9


The accessory nerve has a cranial root and a spinal root, both of which consist of branchial motor fibers.

Branchial motor - cranial root
(special visceral efferent)
Innervates muscles of larynx and pharynx.
Branchial motor - spinal root
(special visceral efferent)
Innervates the trapezius and sternocleidomastoid muscles.

Figure 11-1. Overview of the accessory nerve.

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Last revised: March 22, 1998