Figure 3.

Events that govern the selection process in a network with feedback inhibition. One neuron (N2) receives 10% less excitation than the other (N1). A, The component currents of N1 and N2 (solid/dashed lines). At the left, there is onset of inhibition because of the previous gamma cycle (details not shown). B, As inhibition decays, threshold is reached in N1, causing an action potential. This is followed by an AHP in N1 and feedback inhibition in both cells (with a delay of 3 ms). During this delay, the decline of inhibition in N2 is not sufficient for that cell to reach threshold. C, If the feedback inhibition is prevented, N2 fires. D, If the excitation of N2 is only 5% less than N1, N2 fires.