Fig. 7.

The effect of the LP neuron on octopamine (Oct) and dopamine (DA) induced rhythms in an intact pyloric network with descending modulatory inputs. Simultaneous recordings from the LP and a PD neuron in control conditions (A), during Oct bath application (B), and during DA bath application (C) are shown. In both Oct and DA, the traces shown in 1 demonstrate the final and stable amine-induced rhythm (∼5 min of bath application). The traces in2 show the effect of strongly hyperpolarizing the LP neuron by current injection on the amine-induced rhythm. The traces shown in 2 were recorded a few seconds after the recordings shown in 1. The amine effects and effects of hyperpolarizing the LP neuron were fully reversible.