A distorted representation of the human body mapped onto the cortex, with body part size proportional to the density of sensory or motor innervation.
From Latin 'homunculus' meaning 'little man,' diminutive of 'homo' (man). The 'little man' mapped on the brain.
The cortical homunculus is the brain's weird body map — hands and lips are HUGE because they have the most nerve endings, while the back is tiny!
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