The primary motor cortex
A)is located in the parietal lobes
B)in the left cerebral hemisphere controls skeletal muscles on the right side of the body
C)is the only region of the brain involved with motor control
D)receives motor input from the spinal cord
E)exhibits all of the above

Question

Quizplus · Accepted Answer

The primary motor cortex is located in the frontal lobes and controls skeletal muscles on the opposite side of the body, so the primary motor cortex in the left cerebral hemisphere controls skeletal muscles on the right side of the body. It is not the only region of the brain involved with motor control, but it is a major area. It receives motor input not only from the spinal cord but also from other parts of the brain. Therefore, option B is the best choice.

The Primary Motor Cortex