Fig. 2

Responses of circuits to a linear ramp. A linear ramp elicits a range of qualitatively different responses in adaptive circuits such as (a) An unsteady state, increasing response (circuit DR12.M1: an inflow controlling open system) (b) A non-adaptive steady state (circuit DR08.M31) (c) Partial adaptation (KR11) (d) Exact adaptation (DR08.M1). (e, f) Two apparently similar looking circuits such as DR12.M4 and DR08.M1** (shown in Fig. 1) give contrasting responses. The circuits are depicted as insets in these (and subsequent) plots