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is a cytoarchitectural term denoting the most superficial layer of cerebral cortex in which pyramidal cells predominate. In neocortex it is layer III ( Carpenter-1983 ). In areas of agranular cortex with minimal evidence of an external granular layer (II), the external pyramidal layer is sometimes labeled layer II/III.
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refers to a subdivision of the spinal central gray defined on the basis of cytoarchitecture. It is located in the posterior gray column of the spinal cord between lamina II and lamina IV ( Carpenter-1983 ).
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