Figure 6.
ITD sensitivity of ongoing response is equally sensitive to glycine application. A, Dot raster display of one neuron stimulated with pure tones at BF (630 Hz). Responses for multiple repetitions of ITDs between ±1653 μs without (left; control) and during glycine application (right) are shown. Time axis refers to start of stimulation; stimulus duration was 50 ms (plus 5 ms rise/fall time). Spikes that fell into the time window for ongoing response (gray rectangle) are shown in blue and orange for control and glycine condition, respectively. The first 2 ms of spike trains were discarded and are shown in black. B, ITD functions for ongoing response only, derived from spikes shown in color in A. ITD tuning was shifted significantly toward the left (orange asterisk) during glycine application (orange line) compared with control condition (blue line). After glycine application was terminated, the best ITD immediately shifted back to the right (recovery; gray line). The gray bar marks the “physiological range” of ITDs.