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Cortical homunculus

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The cortical homunculus is the part of the brain responsible for processing and integration of motor information (muscles, motion) and tactile information (touch, senses)

The reason for the distorted appearance is that the amount of cortex is proportional to how richly innervated that region is, not to its size.

The resulting image appears as a disfigured human with disproportionately huge hands, lips, and face in comparison to the rest of the body.

Sensory

Sensory Homunculus Brain

Cortical

Sensory_Homunculus

from Wikipedia

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