ELEVENTH CRANIAL NERVES
\ɪlˈɛvənθ kɹˈe͡ɪnɪəl nˈɜːvz], \ɪlˈɛvənθ kɹˈeɪnɪəl nˈɜːvz], \ɪ_l_ˈɛ_v_ə_n_θ k_ɹ_ˈeɪ_n_ɪ__ə_l n_ˈɜː_v_z]\
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The 11th cranial nerve. The accessory nerve originates from neurons in the medulla and in the cervical spinal cord. It has a cranial root, which joins the vagus (10th cranial) nerve and sends motor fibers to the muscles of the larynx, and a spinal root, which sends motor fibers to the trapezius and the sternocleidomastoid muscles. Damage to the nerve produces weakness in head rotation and shoulder elevation.
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