Sleep parameters during night and day in flies that lived at least 73 days. Values are mean + SEM (eleven 12-hour intervals averaged per each fly, and then averaged across all flies). Genotype (g) effects were tested across all ages (Kruskal-Wallis test, p < 0.05). Horizontal bars indicate significant age-related effects within each genotype (Friedman test followed by Wilcoxon signed-rank test, p < 0.05).
Bushey et al. BMC Neuroscience 2010 11:56 doi:10.1186/1471-2202-11-56