Fig. 2: Quantitative sleep pattern definition based on the probability distribution of rest-bout duration.
From: Quantitative investigation reveals distinct phases in Drosophila sleep

a–b Probability of rest time of male flies in light and dark phases, respectively. c–d Probability of rest time of female flies in light and dark phases, respectively. For both the males and females, 15 examples are shown. Graphs on the left panels of (a–d) use logarithmic scales on both the horizontal and vertical axes, and on the right panels only use logarithmic scale on the vertical. e Schematic of the two phases of sleep behavior in the fly. Power law decay and exponential decay is separated by the sleep latency (K). Five sleep parameters (shown on the right) can be extracted from the sleep pattern to quantitatively analyze the sleep behavior of each individual fly.