Ipsilateral Horner syndrome indicates a cerebrovascular accident (CVA) occurring in the:
A) anterior portion of the pons.
B) internal or middle cerebral artery.
C) posterior inferior cerebellar artery.
D) vertebral or basilar arteries.

Question

Quizplus · Accepted Answer

The posterior inferior cerebellar artery supplies the lateral and posterior portion of the medulla. A CVA involving this artery can produce a neurologic sign of ipsilateral Horner syndrome in the eye.

Ipsilateral Horner Syndrome Indicates a Cerebrovascular Accident (CVA) Occurring in The