Dilation of the ipsilateral pupil following uncal herniation is the result of pressure on which cranial nerve (CN)?
A)Optic (CN I)
B)Abducens (CN VI)
C)Oculomotor (CN III)
D)Trochlear (CN IV)

Question

Quizplus · Accepted Answer

The oculomotor CN (III) is involved in this manifestation of pupil dilation. None of the other options would result in pupil dilation when subjected to pressure.

Dilation of the Ipsilateral Pupil Following Uncal Herniation Is the Result