<P> A cortical homunculus is a distorted representation of the human body, based on a neurological "map" of the areas and proportions of the brain dedicated to processing motor functions, or sensory functions, for different parts of the body . Homunculus is Latin for "little man", and was a term used in alchemy and folklore prior to the concept being utilized in scientific literature . A cortical homunculus, or "cortex man", illustrates the concept of a representation of the body lying within the brain . </P> <P> A motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body . The primary motor cortex is located in the precentral gyrus, and handles signals coming from the premotor area of the frontal lobes . </P> <P> A sensory homunculus represents a map of brain areas dedicated to sensory processing for different anatomical divisions of the body . The primary sensory cortex is located in the postcentral gyrus, and handles signals coming from the thalamus . </P> <P> These signals are transmitted on from the gyri to the brain stem and spinal cord via corresponding nerves . </P>

The sensory homunculus is a cortical representation of
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