Figure 5. (A and B) Representative recordings showing the effects of diazepam (10 [micro sign]M) and GABA (50 [micro sign]M) on the discharge patterns of neocortical neurons. Single bursts indicated by arrows are shown on an expanded time scale on the right. (C) Effects of various agents on the discharge rate, the burst rate, and the number of action potentials per burst (mean values +/- SE). The concentrations and the number of tested cells were: diazepam, 10 [micro sign]M, n = 6; GABA, 50 [micro sign]M, n = 7; muscimol, 0.5 [micro sign]M, n = 6; ethanol, 20 nM, n = 7; propofol, 0.4 [micro sign]M, n = 5; halothane, 125 [micro sign]M n = 6; isoflurane, 160 [micro sign]M, n = 6; enflurane, 310 [micro sign]M, n = 5; pentobarbital, 37 [micro sign]M, n = 6; ketamine, 0.8 [micro sign]M, n = 7.