A, mean frequency of sIPSCs in 3 min epochs in RT and VB neurons in the control period, during NPY perfusion and after 3 min washout. RT (left): n= 14; **P < 0.001, control vs. 100 nM NPY. VB (right): n= 16; *P < 0.05, control vs. 100 nM NPY. B, normalized mean frequency of sIPSCs in control solution and after perfusion with solution containing 100 nM NPY for each neuron of A.▪ and continuous lines, VB neurons; ○ and dashed lines, RT neurons.