Four FS cells and an LS cell that were all depolarized by NA or FNE application in a solution containing CNQX/APV, TTX, or both. The somata and dendrites are shown inblack and the axons in gray. Roman numerals correspond to the cortical layers. A, FS cell with dense innervation mainly above the cell body.B, FS cell with wide innervation. C, FS cell with dense innervation mainly at the level of the cell body.D, FS chandelier cell. E, LS neurogliaform cell.