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Organization of the somatic sensory thalamocortical projections. A. The ventral posterior nucleus has a somatotopic organization: Neurons receiving input
from the leg and arm are located in the lateral division of the nucleus (ventral posterior lateral nucleus, VPL; darker shading), whereas neurons receiving
input from the face are located in the medial division (ventral posterior medial nucleus, VPM; lighter shading). Axons from the ventral posterior nucleus
ascend to the primary somatic sensory cortex in the internal capsule. B. A schematic slice through the postcentral gyrus, showing the somatotopic
organization of the primary somatic sensory cortex. The territory receiving input from the ventral posterior lateral nucleus is shaded darker then the territory
receiving input from the ventral posterior medial nucleus.
Source: Somatic Sensation: Spinal Mechanosensory Systems, Neuroanatomy Text and Atlas, 4e
Citation: Martin JH. Neuroanatomy Text and Atlas, 4e; 2016 Available at: http://mhmedical.com/ Accessed: April 30, 2017
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