Fig. 16

Simulations results of (10) with \(\epsilon=0.001\) to approximate the singular orbit. A: Using parameters \(g_{M}=-0.5\), \(I_{\mathit {ton}}=1\), \(J=0.16\), \(w\approx0.74\) before the I-cell spikes. B: Using parameters \(g_{M}=-0.3\), \(I_{\mathit {ton}}=5\), \(J=0.16\), \(w\approx0.7\) before the I-cell spikes. Top row: voltage traces of the I-cell (blue) and the E-cell (red). Bottom row: the trace of M-current gating variable w