Figure 5: A. Hypothetical spread of neural information from area 3b to other regions of the primary and secondary somatosensory areas (Ri, retroinsular; PA, postauditory; Ig, insular granular; Id, insular dysgranular). B. Hierarchical scheme for the processing of somatosensory information in different cortical areas. From Felleman and Van Essen25 with permission.

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