Figure 2.

A, The histogram shows the latency of response of 86 neurons to the onset of the flashed natural scene stimuli. Latency is estimated from the PSTH averaged across all stimuli (like those in Fig. 1). This includes the latency of the small ON response for most of the neurons in which we have analyzed the sparseness of their larger OFF responses. Three neurons of the 89 are not included because either they gave only OFF responses or their responses were so weak that a clear “turn-up” in the PSTH at response onset was difficult to discern. B, The latency of the offset response for those 52 neurons with a clearly defined offset response. C, The latency of the offset response is plotted against the latency of the onset response. The symbols on the axes show the many cases (x-axis) in which a clear offset response was not discernible and a single case (y-axis) in which no onset response was obvious.