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Characterization of K-Complexes and Slow Wave Activity in a Neural Mass Model

Figure 2

Bifurcation diagram of the cortex with respect to and .

Overview over the models dynamic regimes, obtained via numerical bifurcation analysis of the cortex with respect to and . Hopf bifurcations are drawn in red, while the black line depicts saddle-node bifurcations. The bottom gray line marks the intersection of Hopf and saddle curves, the top gray line the cusp bifurcation. The green line depicts the proposed route for the transition from wake to sleep stage N3. The region around wake corresponds to parameter settings commonly used for wake EEG. N2 and N3 are settings used within this study for the respective sleep stages, as given in Table 2 and 3. Regions I-VI are described in the text and Table 1 (Parameters as in Table S1).

doi: https://doi.org/10.1371/journal.pcbi.1003923.g002