Meaning of the word "accessory nerve" in English

What does "accessory nerve" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

accessory nerve

US /əkˈsesəri nɜːrv/
UK /əkˈses.ər.i nɜːv/
"accessory nerve" picture

Noun

the eleventh cranial nerve, which supplies the sternocleidomastoid and trapezius muscles.

Example:
Damage to the accessory nerve can lead to weakness in the shoulder and neck.
The surgeon was careful to avoid the accessory nerve during the procedure.