Proximal and full-field barrage stimulations induce distinct peri-stimulus time histograms (PSTHs).

A: Example of an increase in the cell’s firing rate in response to barrage stimulation. B: Baseline and steady-state firing rates were similar under the proximal (red) and full-field (green) stimulation conditions (n = 19). Barrage stimulation increased the firing rate significantly (proximal: p = 1.32·10−4; full-field: p = 1.5·10−3; SRT). Central marks indicate the median firing rates and box edges represent 25th and 75th percentiles. n.s—not significant. C: Peristimulus time histograms (n = 19 cells, 25 repetitions per cell) centered around stimulus onset. The peak in population firing rate response to stimulus onset is delayed by approximately 12 ms in the full-field illumination condition (green) compared to the proximal illumination condition (red). Lines represent fitted theoretical curves, corresponding to θf = 0.733 and θp = 0.901.