Spinal Accessory (Noun)
Meaning
Arises from two sets of roots (cranial and spinal) that unite to form the nerve.
Classification
Nouns denoting body parts.
Examples
- The spinal accessory nerve is a unique nerve that arises from two sets of roots, cranial and spinal, that unite to form the nerve.
- The cranial roots of the spinal accessory nerve arise from the cranial nerve nuclei, while the spinal roots arise from the upper segments of the cervical spinal cord.
- The spinal accessory nerve has a cranial root that arises from the nucleus ambiguus and a spinal root that arises from the upper cervical spinal cord.
- Damage to the spinal accessory nerve can result in weakness or paralysis of the sternocleidomastoid and trapezius muscles, which are innervated by the nerve.
- The spinal accessory nerve is the eleventh cranial nerve and is unique in that it arises from two sets of roots, the cranial and spinal roots, that unite to form the nerve.