Fig. 13. The neuropeptide crustacean cardioactive peptide (CCAP) did not affect the pyloric pattern in preparations in which the stn was blocked (not shown) or in preparations with the stn intact. (A,B) Phase plots, showing two cycles of pyloric pattern in control saline (A) and during bath application of CCAP (10^–6 mol l^–1) to the STG (B). (C–E) There were no changes in cycle period (C), spike frequency within bursts (D) or burst duration (E) in any of the pyloric neurons when CCAP was bath applied to the STG. N=4. Error bars indicate standard deviations.