Question

Why is more cortical tissue in the somatosensory cortex devoted to the lips than to the elbows

Answer 1

A sensory homunculus maps sub-regions of the cortical postcentral gyrus to certain parts of the body. ... For example, there is a large area of cortex devoted to sensation in the hands

Answer 2

ANSWER

Penfield referred to his creations as "grotesque creatures" due to their strange-looking proportions. For example, the sensory nerves arriving from the hands terminate over large areas of the brain, resulting in the hands of the homunculus being correspondingly large.

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