A ʺmotor homunculusʺ can be visualized as an overlay on the precentral gyrus. The reason why the facial region of this homunculus covers such a large surface area is because
A) we have very expressive faces.
B) we have very sensitive lips.
C) our eyes are large for seeing.
D) our ears are large for hearing.

Question

Quizplus · Accepted Answer

The facial region of the motor homunculus covers a large surface area because we have very expressive faces, requiring fine motor control and a large number of neurons to manage these expressions.

A ʺMotor Homunculusʺ Can Be Visualized as an Overlay on the Precentral