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The Journal of Mathematical Neuroscience
Fig. 1 | The Journal of Mathematical Neuroscience

Fig. 1

From: Saddle Slow Manifolds and Canard Orbits in \(\mathbb{R}^{4}\) and Application to the Full Hodgkin–Huxley Model

Fig. 1

Critical manifold of (11) with the phase portrait of the reduced system (14) with \(\mu =9.2\), projected onto the (\(x,y,z\))-space. The lower sheet \(S^{a}\) of the critical manifold (gray) is attracting and the upper sheet \(S^{s}\) is of saddle type. The fold curve F (gray line) separates the two sheets. The black dot at the origin is the folded node, and the magenta curve \(\xi _{s}\) is the strong singular canard

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