Accessory-nerve meaning

Either of the 11th pair of cranial nerves, which convey motor impulses to the pharynx and muscles of the upper thorax, back, and shoulders.
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Either of the 11th pair of cranial nerves, which convey motor impulses to the pharynx and muscles of the upper thorax, back, and shoulders.
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(medicine, physiology) The 11th cranial nerves of higher vertebrates, controlling the pharynx, and the muscles of the upper chest and shoulders.
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