The left pupil of a patient fails to accommodate.This finding may reflect an abnormality in which cranial nerve?
A) CN III
B) CN V
C) CN VIII
D) CN X

Question

Quizplus · Accepted Answer

CN III,the oculomotor nerve,is responsible for accommodation.Failure of a pupil to accommodate reflects an abnormality in this cranial nerve.CN V,the trigeminal nerve,controls the corneal reflex,chewing,and biting.CN VIII,the acoustic nerve,plays a role in hearing and the sense of balance.CN X,the vagus nerve,affects heart rate,peristalsis,swallowing,and the gag reflex.

The Left Pupil of a Patient Fails to Accommodate