accessory nerve

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Either of two pairs of eleventh cranial nerves, the motor nerves arising partly from the lateral walls of the medulla oblongata and partly from the cervical (neck) region of the spinal cord, divided into the cranial accessory nerves, distributed by the vagus nerve to the muscles of the larynx and pharynx, and the spinal accessory nerves, supplying muscles in the neck, shoulder, and upper back.

Subjects: Medicine and Health — Psychology.

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