Figure 9

A portion of the twisted slow manifold for C _m = 2 pF, g _K = 4 nS and g _BK = 0.4 nS. The top attracting (${\mathsf{\text{S}}}_{a,C_m}^{+}$, blue surface) and middle repelling (${\mathsf{\text{S}}}_{r,C_m}$, red surface) sheets of the slow manifold are twisted around the blue dashed curve, which is the axis of rotation. The primary strong canard (SC, green) moves from the attracting to the repelling sheet without any rotations. The secondary canards ξ₁ (gray curve, one rotation), ξ₂ (purple curve, two rotations) and ξ₃ (gold curve, three rotations) flow from the attracting to repelling sheet with different numbers of rotations. A portion of the pseudo-plateau burst trajectory (PPB, black curve) is superimposed and has two small oscillations. The full system has unstable equilibrium (cyan, filled curcle).