Figure 14.
Although the pyloric pattern as a whole was less active when the stn was blocked than when it was intact (compare with Fig. 13), RYamide (10−6 M) did not exert any significant effects on the pyloric pattern in these preparations. The IC and VD neurons were not active in these preparations and were not significantly activated by RYamide. (A) Cycle frequency remained unchanged in the presence of RYamide. (B) Duty cycle in the PD, LP, and PY neurons was not altered by RYamide. (C) Number of spikes per burst remained unchanged in the PD and LP neurons during RYamide superfusion. (D) RYamide failed to alter duty cycle in the PD, LP or PY neurons. Error bars indicate standard deviations.