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. Author manuscript; available in PMC: 2009 Nov 27.
Published in final edited form as: Neural Comput. 2009 Aug;21(8):2336–2362. doi: 10.1162/neco.2009.07-08-817

Figure 7.

Figure 7

Perturbations of means (left column) and standard deviations (right column) of first passage times for the SPB model. Panels A, B: effects of single pulse perturbations with varying onset times; vertical axes as in Figs. 2 and 3. -+ denotes effect of negative pulse at positive threshold, +- denotes effect of positive pulse at negative threshold, etc. Due to symmetry, -+ and +- have same effect (solid curves) as do ++ and -- (dashed curves). Panels C, D: responses to zero-effect perturbations; vertical axis in C as in Fig. 4; vertical axis in D shows normalized change in standard deviation as in Fig. 3.