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. 2007 Jan 15;92(2):683–695. doi: 10.1529/biophysj.106.088021

FIGURE 1.

FIGURE 1

Firing properties of three classes of neurons in layer 3/4 somatosensory cortex. (A) Repetitive firing for three different current steps of increasing amplitude: (a) LTS cell (20–250 pA); (b) NPRS cell (90–450 pA); and (c) FS cell (50–300 pA). (B) Expanded view of single spikes and afterhyperpolarizations for an LTS (a), an NPRS (b), and an FS (c) cell. FS cells had larger AHPs than LTS and NPRS cells. (C) Instantaneous firing frequency (1/interspike interval) versus time after the onset of current pulse for LTS, NPRS, and FS cells. Depolarizing current steps were, respectively, 120 pA, 200 pA, and 160 pA for LTS, NPRS, and FS cells. For each case, firing frequency was stable after 150 ms from the stimulus onset and the adaptation effect was small at these levels of current input.