The area of the motor cortex that is devoted to a particular region of the body is proportional to the
A) size of the body area.
B) distance of the body area from the brain.
C) number of motor units in that region.
D) number of sensory receptors in the area of the body.
E) size of the nerves that serve the area of the body.

Question

Quizplus · Accepted Answer

The area of the motor cortex that is devoted to a particular region of the body is proportional to the number of motor units in that region. This means that body areas that require more precise and complex movements (like the hands or face) have a larger representation in the motor cortex compared to less complex areas (like the torso or legs) which require less precise movements.

The Area of the Motor Cortex That Is Devoted to a Particular