Figure 2.

Coupling reduces the variability of dim flash responses. A, B, Rod voltage responses recorded in two rods to a series of dim flashes evoking ∼1 R*. Tick marks indicate flash timing. Bandwidth, DC–5 Hz. C, E, Response mean (C) and variance (E) of rod in A to 50–100 flashes evoking 1.5, 2.8, and 5.5 R*. D, F, Peak amplitude of the mean (μ) and variance (σ²) as a function of R*, measured from rod A (○) and B (▿). The lines near the data points are the best-fit linear functions passing through the origin. From the slopes of the lines, N was calculated as 0.9 (○) and 10.2 (▿). G, Histogram of N from 14 rods.