Fig. 1.

Organization of the stomatogastric nervous system.Top, Schematic of the stomatogastric nervous system showing the paired CG, OG, STG, and the associated nerves used in the recordings in this paper. These include the stn, mvn, dvn, lvn, and lgn. The arrow shows the position where the stn was cut or the Vaseline well used for blocking the stn was placed (Materials and Methods). Intracellular recordings were made from the somata (microelectrode) and extracellular electrodes used to record action potentials in the motor nerves. Bottom, Connectivity diagram of the pyloric network neurons that are the focus of this paper. The resistor symbol denotes an electrical connection, and the filled circles represent chemical inhibitory synaptic connections.