A 66-year-old man is evaluated in the emergency department due to weakness and loss of speech. The patient is known to have hypertension and diabetes Mellitus. He has been smoking 1 pack of cigarettes for the last 30 years. The wife was waking him up when she found him unable to speak or move. Physical examination shows a normal pupillary response. The horizontal eye movements are impaired, with an intact vertical gaze. There is a loss of the motor power of the four extremities. A lesion in which of the following sites would explain the patient's symptoms?

Question

Quizplus · Accepted Answer

Eductional Objective: Locked-in syndrome results from bilateral damage of the ventral pons. Ventral pons injury would lead to disruption of corticospinal and corticobulbar tracts, The consciousness, eye vertical movements, and sensation are spared.

A 66-Year-Old Man Is Evaluated in the Emergency Department Due