Fig. 8. In preparations with relatively weak baseline firing, dopamine was capable of activating a typical pyloric pattern, as was the case in the preparation shown here. Recordings of the pyloric pattern in (A) control, (B) when dopamine (10^–4 mol l^–1) was superfused over the STG, and (C) in wash. Nerves: mvn, medial ventricular nerve (recording action potentials of the VD and IC neurons); pdn, pyloric dilator nerve (recording action potentials of the PD neurons); lvn, lateral ventricular nerve (recording action potentials of the PD, LP and PY neurons).