Stability Switches and Hopf Bifurcation in a Coupled FitzHugh-Nagumo Neural System with Multiple Delays

Figure 9

Function 𝐺 curve ((a), (c), and (e)) and eigenvalues real parts with 𝜏₂ varying ((b), (d), and (f)) for the different coupling weights (a)-(b) 𝑐=0.2, (c)-(d) 𝑐=0.8, and (e)-(f) 𝑐=1.8. The other parameters are fixed as 𝑎=0.33, 𝑏=1, 𝛾=0.47, and 𝜏₁=0.5.

(a)

(b)

(c)

(d)

(e)

(f)