The reason the homunculus for the motor cortex is shaped the way it is (huge tongue,large hands)is that
A) it is a drawing of all the motor functions of the body, and it is not drawn to scale.
B) the amount of cortex devoted to each part of the body is represented by the relative size of the body part.
C) it is a reproduction of a drawing done the late eighteenth century.
D) there is an inverse relationship between the actual size of each body part to its representation in the homunculus drawing.

Question

The reason the homunculus for the motor cortex is shaped the way it is (huge tongue,large hands)is that 
A) it is a drawing of all the motor functions of the body, and it is not drawn to scale. 
B) the amount of cortex devoted to each part of the body is represented by the relative size of the body part.​ 
C) it is a reproduction of a drawing done the late eighteenth century.​ 
D) there is an inverse relationship between the actual size of each body part to its representation in the homunculus drawing.​

Quizplus · Accepted Answer

The homunculus for the motor cortex is shaped the way it is to represent the relative amount of cortex devoted to each part of the body. The larger the representation, the larger the amount of cortex devoted to it. This is why some body parts, such as the hands and face, appear larger than others, such as the trunk or legs.

The Reason the Homunculus for the Motor Cortex Is Shaped