Interspike intervals within retinal spike bursts combinatorially encode multiple stimulus features
Fig 5
3-Spike burst ISI patterns encode the phase and amplitude of oscillatory components.
(A–C) Analysis of the cell shown in Fig 1. (A) Stimulus sequences preceding 3-spike bursts with different burst phases. Bursts were divided into 12 groups according to the burst phase (bin size = 30°). Stimulus sequences preceding the bursts in each group were averaged and are shown in each row. (B) Average stimulus sequence preceding 3-spike bursts (3-BTA). (C) Deviation from 3-BTA calculated by subtracting the 3-BTA shown in (B) from the preceding sequences shown in (A). (D–F) Population analyses. (D) Same analysis as in (C), averaged among 19 cells that generated at least 1200 3-spike bursts. (E) Thick lines indicate data in (D) at the indicated burst phase. Thin lines indicate the SEM values calculated across the cells. Peaks around −100 ms are indicated. (F) Horizontal axis: , i.e., the distance of the point (u1,u2) from the origin in the u1–u2 plane in Fig 4E. Vertical axis: the root mean square of the oscillatory components between −200 and 25 ms. The error bars indicate SEM values for the 19 cells.