Fig. 9. The GABAergic inhibitory postsynaptic response (arrowhead) always preceded the postsynaptic responses separated under Ca²⁺-free conditions (double arrowhead). The sensory responses remained under Ca²⁺-free conditions, postsynaptic responses separated under Ca²⁺-free conditions and GABAergic inhibitory postsynaptic responses blocked by bicuculline in each MGC sub-region were superimposed. The delay time of the GABAergic inhibitory postsynaptic response from the first peak (0.2±0.2 ms) was shorter than the delay time of the postsynaptic response blocked by Ca²⁺-free saline (1.5±0.5 ms) (P<0.05; paired t-test, N=7).