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Previous studies have shown that via a shunting effect, activation of K+ channels and partial inactivation of Na+ channels (Monsivais & Rubel, 2001; Tang et al. 2011), a depolarizing GABAergic inhibitioncan reduce the size and shorten the duration of EPSPs and may facilitate the coincidence detection in the NL neurons (Funabiki et al. 1998; Yang et al. 1999). Here, we further investigated the effects of synaptically released GABA on the excitability of NL neurons, and predicted that the GABAergic inhibition produced longer-lasting suppression of neuronal excitability in http://www.selleckchem.com/products/cobimetinib-gdc-0973-rg7420.html MH/HF than in LF neurons. We first altered the timing of the IPSP elicited by a single-pulse stimulus, and examined its effects on the spiking activity in response http://www.selleck.cn/products/incb024360.html to a prolonged suprathreshold (100 pA above the current thresholds) somatic current injection. The single IPSP suppressed the firing, and the inhibition window (the width at 50% reduction in firing probability) was much longer in MF/HF neurons than in LF neurons (Fig. 8A�CC, LF: 28.7 �� 3.1 ms, n= 6, MF/HF: 76.4 �� 11.1 ms, n= 7, P http://www.selleckchem.com/products/bmn-673.html that extended beyond the duration of the stimulation (Fig. 8D), consistent with previous studies (Yang et al. 1999). Interestingly, the inhibition in MF/HF neurons lasted longer and suppressed more spikes than in LF neurons (% inhibition of firing probability, LF: 10.7 �� 2.9, n= 5, MF/HF: 50.5 �� 5.2, n= 7, P