Term: inverted pyramidal cell

Definition: One other cell type within the definition of the narrow field vertical cells is what iscalled an inverted pyramidal cell. They are similar to pyramidal cells except that the cell body lies within the deep portion of the zone of horizontal cells. The superficial field is a circumsomatic field and the deep field is elongated to reach into the deeper portion of the zone of vertical cells. The cell body is about the size of an intermediate vertical fusiform cell soma. The axon is similar, but more apt to have collaterals to the superficial zones.