Abstract
Rhythmic motor patterns are produced by networks with oscillatory outputs. These networks or central pattern generators underlie behaviours such as respiration, heartbeat, swimming and feeding (Cohen et al., 1988; Jacklet, 1989). We now know that rhythmic output can be generated by non-oscillatory neurons that are connected by reciprocal inhibitory synapses, “half-center oscillators” (e.g., Arshavsky et al., 1993; Calabrese and DeSchutter, 1992; Satterlie, 1985). In this paper we examine frequency control in half-center oscillators.