Fig. 5.

Effects of bath-applied dopamine (DA), serotonin (5HT), and octopamine (Oct) on the intact pyloric network with descending modulatory inputs. A, Simultaneous recordings from four of the six pyloric neuron classes. All of the recordings are from a single preparation. All amine effects were reversible after wash with normal saline. B, Effects of bath-applied amines on the pyloric cycle frequency in the intact pyloric network with descending modulatory inputs. Open bars, Control;filled bars, amine bath application. Data show the mean of six different preparations ± SD. Cycle frequency in 5HT (*) is significantly different from control, Oct, and DA frequencies.