The somatosensory cortex

Mammals vary in the number of cortical areas involved in processing somatosensory information. Most mammals appear to have areas S1, S2, and PV, as well as strip-like somatosensory areas along the rostral and caudal borders of S1. In monkeys and other higher primates, cortex caudal to S1 is differentiated into areas 1 and 2, each also representing cutaneous receptors, and there is evidence for a ventral somatosensory area, VS, adjoining S2. Processing is more serial in monkeys so that the responsiveness of S2 depends on S1.

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