What is the most developed neocortical layer In the primary sensory cortex ?

Layer 6 is the first neocortical layer to develop (Rakic, 2009, for an excellent review of cortical development) and the cortico-thalamic (CT) pyramidal cells of layer 6 may be the earliest pyramidal cells to populate the developing neocortex (for distinctive features of CT and CC cells in adult cortex).

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