Fig. 1.

A, The firing rate (averaged in 10 sec bins) of a phasic supraoptic neuron immediately before (top panel), during the final 15 min of (middle panel), and after (bottom panel) inclusion of nor-binaltorphimine (200 μg/ml) in the dialysate (aCSF at 2 μl/min) retrodialyzed directly onto the nucleus.B, The mean firing rate, intraburst firing rate, burst duration, interburst interval, and activity quotient of six phasic supraoptic nucleus neurons recorded from five rats treated as inA. *p < 0.05 versus basal; Wilcoxon signed rank test.