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. 2015 Jul 15;6:7709. doi: 10.1038/ncomms8709

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(a–d) The stability region of AD with time delays uniformly distributed over τ±0.02 for α=1, 0.99, 0.98 and 0.97, respectively. The stable AD region breaks into three disconnected and bounded islands for α=0.97. A feeble decrease in the value of the limiting factor α from unity drastically shrinks the stable regions of AD in the parameter space, which implies that dynamic activity is efficiently restored. AD is impossible for any values of τ and K if α<α_min=0.424. The intrinsic frequencies are fixed as w₁=w₂=w=30.