Figure 5

The reduced, 2-cell network. (a) Compared to the network in Fig. 4(a), we have replaced the IB cell by an external oscillatory input of frequency 16.357 Hz (frequency chosen so that the ratio of the two input frequencies is not a rational number with a small denominator). This input consists of a single short pulse at the beginning of the period (see Sect. 2.2 and Appendix D.1); we do not model the bursting behavior of the IB cell. The effect of the input onto the FS and SI cells is mediated through excitatory synapses with the same dynamics as the IB→FS and IB→SI synapses before (see Sect. 2.2 and Appendix D.1). (b) Membrane potentials of the cells for a simulation of the network shown in (a)