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单词 accessory nerve
释义 accessory nerve
noun
also accessory
: either of the 11th pair of cranial nerves, being a motor nerve, arising partly from the lateral wall of the medulla and partly from the cervical spinal cord, supplying the pharynx, trapezius, and sternocleidomastoid muscles as well as sending fibers to the vagus nerve in higher vertebrates, and being absent from lower forms
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