AR in FS-FS synapses in human cortical tissue.

<p>(A) Example FS-FS pair. Step current injection induced high-frequency discharges in the presynaptic FS neuron and synaptic events in the postsynaptic FS neuron. Arrowheads indicate the AR events after the stimulus. (B) Same pair as in (A). Overlay of unitary IPSCs evoked by single APs. (C) Example current traces showing the dependence of AR on the number and the frequency of presynaptic APs. (D) Group data of FS-FS pairs. (E) Plot of PT-AR frequency (bin size: 50 ms) as a function of time since the stop of stimulus (20 or 40 APs at 200 Hz). * <i>p</i><0.05; ** <i>p</i><0.01.