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Homunculus primary motor cortex Illustration and Icon
Homunculus primary motor cortex
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A schematic neuroanatomical illustration of the somatotopic motor homunculus mapped onto the primary motor cortex (M1) of the frontal lobe. The distorted human features—especially the hand, lips, and tongue—are enlarged along the precentral gyrus to indicate disproportionate cortical representation for fine motor control. This anatomical structure is the cerebral cortex of the brain within the central nervous system, studied in neuroanatomy and motor physiology. Pyramidal neuron populations here initiate corticospinal outputs enabling voluntary movement. The species depicted is Homo sapiens (human).
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