A patient with progressive supranuclear palsy is suffering from gradual deterioration of his superior colliculus. Which of the following statements best describes the result of this disease?
A)The patient has intact acuity and shape perception, but he can no longer recognize visual objects.
B)The patient demonstrates the phenomenon of blindsight.
C)The patient is cortically blind.
D)The patient is unable to initiate eye movements.

Question

Quizplus · Accepted Answer

The superior colliculus is responsible for initiating eye movements, specifically saccades, and is affected in patients with progressive supranuclear palsy. As a result, the patient is unable to initiate eye movements, leading to difficulty in focusing on visual stimuli. Therefore, choice D is the best answer.

A Patient with Progressive Supranuclear Palsy Is Suffering from Gradual