If a patient cannot shrug his or her shoulders against resistance, which cranial nerve (CN) requires further evaluation?
A) CN I, olfactory
B) CN V, trigeminal
C) CN IX, glossopharyngeal
D) CN XI, spinal accessory

Question

Quizplus · Accepted Answer

CN XI is responsible for the motor ability to shrug the shoulders. CN I is associated with smell reception and interpretation. CN V is associated with opening of the jaw, chewing, and sensation of the cornea, iris, conjunctiva, eyelids, forehead, nose, teeth, tongue, ear, and facial skin. CN IX is associated with swallowing function, sensation of the nasopharynx, gag reflex, taste, secretion of salivary glands, carotid reflex, and swallowing.

If a Patient Cannot Shrug His or Her Shoulders Against