Fig. 2From: Dynamical systems analysis of spike-adding mechanisms in transient burstsFormulation of system (1) as the boundary value problem (5)-(8). The first (red) segment is the solution u ON (t) of (1) with I app =20μ A/cm 2 and u ON (0) at the resting potential u OFF ∗ , which is an equilibrium of (1) for I app =0 (indicated by the horizontal black dashed line). The total integration time is T ON =3ms, such that one action potential occurs. The second (blue) segment is the solution u OFF (t) of (1) with I app =0 and u OFF (0)= u ON (1); the integration time T OFF is fixed to a large enough value so that u OFF (1)≈ u OFF ∗ .Back to article page