Fig. 6. LG shows no inactivation during strong AGR firing. (A) Response of LG to AGR depolarization with different currents (bottom, +5 nA; middle, +1 nA; top, +0.5 nA). AGR activity is shown as instantaneous firing frequency. (B) Plot of LG intraburst firing frequency over AGR firing frequency. (C) In preparations without spontaneous gastric mill rhythms, rhythmic AGR stimulation elicited a gastric mill rhythm which included activity of pro- (LG, GM) and retractor motor neurons (DG). See text for definition of abbreviations.