Fig. 7.

Stability regimes of the resting state at p = 1, i.e. prior to the administration of propofol. a The stable regime is given by Eq. 30 for γ < 1/2, while γ ≥ 1/2 leads to stability for all ω²₀. The specific result β₂ ≈ 8.5β₁ yields the specific solutions (31) represented by the dashed line: for γ < 1/2 the solutions are unstable and for γ ≥ 1/2 they are stable. b, c show the stability regime with respect to the excitatory time scales τ₁, τ₂ for the specific case β₂ = 8.5β₁ according to Eq. 32. The border point C is located at τ₁ = τ₂ = η₁/38. b η₁ = 10ms, c η₁ = 30ms.