A, Original recordings show that L-AP4 decreased the frequency of sEPSCs in labeled PVN neurons in a concentration-dependent manner in WKY rats and SHRs. B-E, Cumulative probability analyses show that L-AP4 decreased the frequency (D and E), but not the amplitude (B and C), of sEPSCs in labeled PVN neurons in WKY rats and SHRs. F and G: Summary data show the effect of L-AP4 on the frequency (F) and amplitude (G) of sEPSCs in labeled PVN neurons in WKY rats (n = 13 neurons from 4 rats) and SHRs (n = 15 neurons from 4 rats). *P < 0.05 and **P < 0.01, compared with the baseline for the group. ##P < 0.01, compared with the baseline in WKY rats.