Accessory Nerve

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Related to spinal accessory: vagus nerve

accessory nerve

[ak′ses·ə·rē ‚nərv]
(neuroscience)
The eleventh cranial nerve in tetrapods, a paired visceral motor nerve; the bulbar part innervates the larynx and pharynx, and the spinal part innervates the trapezius and sternocleidomastoid muscles.

Nerve, Accessory

 

(nervus accessorius, or nerve of Willis, after the English physician T. Willis, who first described it in 1664), the 11th pair of cranial nerves.

The accessory nerve originates in the medulla oblongata and the spinal cord. It emerges from the cranial cavity with the glossopharyngeal and vagus nerves through the jugular foramen and supplies motor fibers to the sternocleidomastoid muscle on the neck (with unilateral contraction, this muscle inclines the head to the side and turns the face in the opposite direction) and to the trapezius muscle on the back (it raises the pectoral girdle and adducts the scapula). Some of the fibers of the accessory nerve are connected to the vagus nerve and with its branches reach the muscles of the soft palate, the pharynx, and the larynx.

References in periodicals archive ?
Specimens of bilateral neck dissection with preservation of the spinal accessory nerve, internal jugular vein and sternocleidomastoid muscle.
Spinal accessory nerve can be a cause of scapular winging and shoulder dysfunction.
In 1972, Kotani11 used the spinal accessory nerve, for the first time, as a donor motor nerve for nerve transfer in patients with brachial plexus injury.
Shoulder function following partial spinal accessory nerve transfer for brachial plexus birth injury.
(18) Additionally the nerve transfer can improve shoulder stability and abduction because it is additive with the spinal accessory to suprascapular nerve transfer.
Spinal accessory nerve affecting the scapulae had major involvement and minimal motor function.
Flanagan testified that had she been informed of a risk of injury to the spinal accessory nerve and had she been apprised of the alternatives, such as observation and/or needle biopsy, she would have declined to authorize the excision of the enlarged node.
Spinal Accessory Nerve: The Spinal accessory nerve consists entirely of motor fibers to the SCM and Trapezius muscle.
We conducted a study to evaluate the hypothesis that the preservation of cervical root branches of the cervical plexus is associated with greater shoulder mobility, less loss of face and neck sensation, and better quality of life (QoL) following functional neck dissection in which the spinal accessory nerve is spared.
This subluxation pattern, known as Hatcher-Murphy Subluxation (HMS), shows manifestation or dysfunction of the tissues involving the brainstem, the vagal nerve or cranial nerve 10 and the spinal accessory nerve or cranial nerve 11.
Nerve injury about the shoulder in athletes, part 2: long thoracic nerve, spinal accessory nerve, burners/stingers, thoracic outlet syndrome.