FIGURE 9-33 Neural Circuit in a Column in the Visual Cortex In this three-dimensional view, sensory inputs enter the cortical column at layer VI (bottom) and terminate on stellate cells in layer IV that synapse with pyramidal cells in layers III and V. The information flow is vertical. Axons of the pyramidal cells leave the column to join other columns or structures.

Information from J. Szentagothai (1975). The “module-concept” in cerebral architecture. Brain Research, 95, p. 490.