Major connections between somatosensory areas. Schematic representation of the major connections between somatosensory areas in the central nervous system, split into four major regions: the thalamus, the anterior parietal cortex (APC), the lateral parietal cortex (LPC), and the posterior parietal cortex (PPC). Abbreviations: Ventral posterior nucleus (VP), anterior pulvinar nucleus (Pla), secondary somatoensory cortex (S2), parietal ventral area (PV), parietal reach region (PRR). Area 5 also receive input from the lateral posterior nucleus in thalamus (LP, not shown in the chart).