The entire body surface can be mapped onto the primary somatosensory cortex, based on the density of mechanoreceptors and the ability to make fine discriminations in touch in a given area.Which of the following would require the smallest amount of cortical representation in comparison to its surface area?
A) Legs
B) Hands
C) Fingers
D) Face
E) Lips

Question

Quizplus · Accepted Answer

The legs have a lower density of mechanoreceptors and a lesser ability to make fine discriminations in touch compared to areas like the hands, fingers, face, and lips. Therefore, they require a smaller amount of cortical representation relative to their surface area.

The Entire Body Surface Can Be Mapped onto the Primary