A 23-Year-Old Man Is Evaluated for Left-Hand Tremors for the Past

A 23-year-old man is evaluated for left-hand tremors for the past month. He feels shy in social activities and has this tremor affected his function level. He was diagnosed with multiple sclerosis with a relapsing-remitting course. Physical examination does not show any tremors at rest. A tremor appears when the patient is asked to grab an object from the table. Once the patient's hand is close to the object, it becomes more intense. Dysfunction in which of the following structures explain the patient's symptoms?

A) Basal ganglia
B) Cerebellum
C) Motor cortex
D) Premotor cortex
E) Thalamus

Correct Answer:

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