Figure 4.

Temporal kinetics of the light response. A, Mean spike-triggered averages (linear filters) for broad thorny cells (red, n = 6) and ON parasol cells (blue, n = 4). The STA for each cell was normalized by the absolute value of the peak. Shaded areas represent 1 SEM. ON parasol cells exhibit faster kinetics than broad thorny cells. B, Summary of kinetic properties. Filter (STA) peaks were faster for ON parasol cells (blue) than for broad thorny cells (red). Individual cells are indicated by circles. The zero-cross was likewise shorter for ON parasols than for broad thorny cells. Error bars indicate mean ± SD. C, Example output nonlinearities of an ON parasol and a broad thorny ganglion cell. The x-axis indicates linear prediction generated by convolution of the STA with the stimulus. The y-axis shows the actual spike output of the cells.