Fig. 6

Differential firing patterns of dPAG and vPAG neurons. a Average spike waveform (n = 84) and b spike-time autocorrelograms of the respective units. c The neurons are clustered according to waveform asymmetry and the average filtered peak width. Different color symbols represent neuron units in different brain regions. Symmetry index = (b − a)/(a + b). d Average spike waveform of two typical channel neurons in different states