Figure 3.

Perturbing only a proportion of the inhibitory population may not give rise to a paradoxical inhibitory response. A, B, Result of increasing (A) and decreasing (B) input to a portion p = 50% of the inhibitory population (cf. Fig. 2). Although this network is an ISN with same parameters as in Figure 2, the response of inhibitory neurons to perturbation is starkly different. No evidence for the paradoxical response is visible, the perturbed inhibitory neurons simply follow the perturbing stimulus. Dashed trace is the response of nonstimulated inhibitory neurons shifted up for visibility. The response of excitatory neurons (red) and nonstimulated inhibitory neurons (dashed) are identical.