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Summary

By Ehud Ahissar.

Closed-loop connections of the primate hand tactile system. Sensory information from the skin of the primate fingers is transmitted via multiple pathways through the sensory regions of the brain, feeding motor subcircuits of the neocortex, cerebellum, midbrain and spinal cord, which in turn feed back to the muscles that move the fingers. Oval circles indicate the brain regions involved in the hand tactile sensory-motor processing (DrG, Dorsal root ganglion; DH, dorsal horn of the spinal; Cu, nucleus cuneatus; Gr, nucleus gracilis; SC, superior colliculus; ZI, zona incerta; VPL, ventral posterolateral thalamic nucleus; IL, intralaminar nuclei of thalamus , ; P, posterior nuclear group of thalamus ; VL, ventrolateral thalamic nucleus;; SI, primary somatosensory cortex; SII, secondary somatosensory cortex ; MCx, motor cortex; BG, basal ganglia; RN, red nucleus; Cer, cerebellum; IO, inferior olive; RF, reticular formation; VH, ventral horn of the spinal cord). Other details are similar to those in Figure 1.

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