The body part that has the greatest area of representation in the primary motor cortex is the:

A 76-year-old man suffers a stroke that severely impairs his speech. The area of the brain that is most likely damaged is:

Which of the following best describes the transmitter released from Renshaw cells and the primary action of Renshaw cells under normal physiologic conditions?

Which of the following is most likely to be decreased in a patient with Huntington disease?

Damage to Broca’s area on the dominant side of the brain results in:

A 38-year-old woman is taken to the physician because of uncontrolled movements of the arms, legs, head, face, and upper body. These symptoms have increased progressively over the past 12 months. She is also depressed and irritable, and she repeats the same question 6 times during the 30-minute office visit. Gene analyses show expansion of a CAG triplet repeat on chromosome 4. The MOST likely diagnosis is:

A muscle spindle is most likely to sense:

The fiber that is responsible for the dynamic response in a muscle spindle receptor is the:

Which of the following structures in the vestibular apparatus is responsible for the detection of angular acceleration?

Decerebrate rigidity can be explained, at least in part, by: