Fig. 7. Comparison of the postsynaptic activity, evoked by stimulation of the medial nerve (MN) and the lateral nerve (LN), among these macroglomerular complex (MGC) sub-regions. The maximum amplitudes of the three responses, the postsynaptic responses, the GABAergic inhibitory postsynaptic responses and the excitatory postsynaptic responses were compared among different MGC sub-regions. (A) When the MN was stimulated, the maximum amplitudes of the postsynaptic responses in the medial toroid (mT) and central toroid (cT) were significantly larger than those of the lateral toroid (lT). In the cumulus, the maximum amplitude of the postsynaptic response in the medial cumulus (mC) was significantly larger than that of the lateral cumulus (lC). Asterisks show that the maximum amplitudes of these responses are significantly different (P<0.05, one-way repeated-measures ANOVA, N=8). The peak amplitudes of the GABAergic inhibitory responses were not significantly different among these MGC sub-regions. (B) When the LN was stimulated, postsynaptic responses in the lT and the lC were detected, but not in other MGC sub-regions. In the toroid, the maximum amplitude of the excitatory postsynaptic response of the lT was significantly larger than that of the cT (P<0.05, one-way repeated-measures ANOVA, N=7). In the cumulus, the maximum amplitude of the postsynaptic response of the lC was significantly larger than that of the mC (P<0.05, one-way repeated-measures ANOVA, N=7). The maximum amplitudes of the GABAergic responses were not significantly different among these MGC sub-regions except mT. N.D., not detected.