Fig. 10. Excitatory junction potentials (EJPs) inhibited by the opener inhibitor (OI) (left: interstimulus interval 52 ms, OI precedes OE) and by the common inhibitor (CI) (right: CI and OE stimulated simultaneously) superimposed on the EJPs recorded in the absence of inhibitory stimuli (broken lines). In these examples, OI inhibited the area under the EJP by 75.9% and the amplitude of the EJP by 29.7%. CI inhibited the area under the EJP by 49.8% and the amplitude of the EJP by 16%. Scale bar on left, 2 mV, 200 ms; scale bar on right, 1 mV, 200 ms.