Interspike intervals within retinal spike bursts combinatorially encode multiple stimulus features
Fig 2
The spike number within a burst encodes the amplitude of light intensity modulation.
(A) 1-, 2-, 3-, and 4-BTA indicate the average of stimulus sequences preceding isolated spikes and 2-, 3-, and 4-spike bursts, respectively. The average and standard error of the mean (SEM) were calculated across n = 41 cells. (B) Difference between 3-BTA and 1-BTA, averaged across n = 41 cells. The thin lines indicate the SEM calculated across the cells. (C) Analysis of s3−1, the stimulus projected onto 3-BTA−1-BTA. The dashed line indicates P(s3−1) averaged across n = 41 cells. The SEM calculated across for P(s3−1) cells is not shown because it was very small. The thick lines correspond to P(s3−1|1-spike), P(s3−1|2-spike), P(s3−1|3-spike), and P(s3−1|4-spike) averaged across n = 41 cells. The thin lines are the SEM calculated across the cells. (D) Similar to (C), calculated for s3−1,burst, which was normalized for values at all time points of isolated spikes and bursts.