The Reason the Homunculus for the Motor Cortex Is Shaped

question 7

Multiple Choice

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) in the homunculus picture,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.The trunk of the body,for instance,is drawn very small,while the tongue is drawn very large.

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