Figure 1.

Synaptic connectively of the N3t neuron. The N3t has monosynaptic inhibitory connection (black dot) with the CPG neuron, the N1M, and a monosynaptic excitatory connection (vertical bar) with the B3, a motoneuron that innervates the buccal mass. The B3 neuron is routinely recorded to monitor of N3t firing as each spike in the N3t is accompanied by 1:1 EPSPs in the B3 (Elliott and Benjamin, 1985). Tonic N3t firing inhibits activity in the N1M either completely or partially depending on the firing rate of the N3t (Staras et al., 2003).