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

Question

Quizplus · Accepted Answer

The area of sensory cortex devoted to a body region is relative to the number of sensory receptors in the region of the body. This is known as the sensory homunculus, where more sensitive regions of the body (such as the fingertips) have a larger representation in the sensory cortex compared to less sensitive regions (such as the back).

The Area of Sensory Cortex Devoted to a Body Region