A medical artist is drawing a homunculus with body-part size in relation to the size devoted to it in the somatosensory cortex.Which body part should be drawn LARGEST?
A)the arm
B)the thumb
C)the chest
D)the foot

Question

Quizplus · Accepted Answer

The homunculus is a representation of the body in the somatosensory cortex, where body parts are arranged in proportion to the amount of sensory information they receive. The hand and particularly the thumb have a large cortical representation compared to other body parts, as they require a high level of sensitivity and dexterity for fine motor control. Therefore, the thumb should be drawn as the largest body part in the homunculus.

A Medical Artist Is Drawing a Homunculus with Body-Part Size