Accessory Nerve Diseases

Diseases of the eleventh cranial (spinal accessory) nerve. This nerve originates from motor neurons in the lower medulla (accessory portion of nerve) and upper spinal cord (spinal portion of nerve). The two components of the nerve join and exit the skull via the jugular foramen, innervating the sternocleidomastoid and trapezius muscles, which become weak or paralyzed if the nerve is injured. The nerve is commonly involved in MOTOR NEURON DISEASE, and may be injured by trauma to the posterior triangle of the neck.

Year introduced: 2000

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Tree Number(s): C10.292.175

MeSH Unique ID: D020436

Entry Terms:

• Accessory Nerve Disease
• Cranial Nerve Eleven Diseases
• Cranial Nerve Eleven Disorders
• Cranial Nerve XI Diseases
• Eleventh Cranial Nerve Disease
• Spinal Accessory Nerve Diseases

Previous Indexing:

• Accessory Nerve (1965-1999)
• Cranial Nerve Diseases (1981-1999)

See Also:

• Cranial Nerve Injuries

All MeSH Categories
Diseases Category
Nervous System Diseases
Cranial Nerve Diseases
Accessory Nerve Diseases
Accessory Nerve Injuries