A 62-year-old man arrives to the office with clumsiness in his right arm. A physical examination indicates right arm and leg motor weakness. The patient's speech is slurred, and his right lower face is sagging. When the right arm is passively flexed, there is early resistance followed by a dramatic release of tension as the flexion continues. Which of the following brain structures is most likely to blame for this patient's condition?

Question

Quizplus · Accepted Answer

Eductional Objective: Internal capsule stroke causes contralateral weakness with clasp-knife spastic stiffness, hyperreflexia, and a positive Babinski sign. These lesions harm the pyramidal motor system (corticospinal tracts, for example), which goes from the precentral gyrus (primary motor cortex) to the brainstem and spinal cord via the internal capsule.

A 62-Year-Old Man Arrives to the Office with Clumsiness in His