Fig. 5.

Gastric mill cycle period is sensitive only to the effects of network feedback on MCN1 activity. A and B: during MCN1 stimulation a gastric mill rhythm is evident in the 1:1 alternating bursting of the DG and LG neurons. The gastric mill cycle period was shorter during 15-Hz pyloric-timed (A) than 15-Hz tonic (B) MCN1 stimulation. Across preparations cycle period was shorter during pyloric-timed than tonic stimulation. C: although on average across preparations gastric mill cycle periods are shorter at higher MCN1 activity rates, within individual experiments this relationship was not evident and thus gastric mill cycle period was not dependent upon MCN1 activity rate (n = 4–20). **P < 0.01. ns, Nonsignificant.