Definition: Regions of the cerebal cortex characterized by a particularly well-developed inner granular layer (layer 4); this type of cerebral cortex is represented by the primary sensory Brodmann area 17 of the visual cortex, Brodmann areas 1–3 of the somatic sensory cortex, and Brodmann area 41 of the auditory cortex.
[G. konis, dust, + L. cortex, bark]
See Also: cerebral cortex
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