The sensory homunculus shows where each portion of the body is processed along the cerebral cortex.
The body is covered in the sensations. Any location between the cerebral cortex and the hypoglossal nerve nuclei can experience supranuclear lesions of the hypoglossal nerve. The cerebral cortex communicates with a number of subcortical regions, including the thalamus and basal ganglia, via efferent connections and afferent connections, respectively. Typically, this topograph consists of body parts mapped along the surface of the postcentral gyrus of the parietal lobe. The sensory homunculus' topology matches to the body's opposite side. This area corresponds to the sensory area of the lower extremities and genitalia, starting from the medial aspect of the postcentral gyrus.
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