Fig. 4.
Spikes were triggered by short decreases in inhibition. A, STAs of the normalized inhibitory input frequency. The value of 1.0 corresponds to the mean input frequency of 35 Hz. The instantaneous input frequencies were computed by convolving each input spike with a 1 msec Gaussian. The input synchronization was high (gray trace) or intermediate (black trace). B, STAs ofGin normalized to the mean level of conductance at each input gain. The value of 1.0 corresponds to 0.5 nS (left), 2 nS (middle), and 16 nS (right). The neuron, input synchronizations, and input gains are the same as in A. C, Stimulus-aligned spike rasters for two input synchronizations for the input gain factor of 16. The neuron is the same as in A and B. D, Gin (gray trace) and the reconstruction of Gin(black trace) calculated by convolving the spike rasters in C with the corresponding STAs inB.