Daily profile of locomotor activity of representative mice of the B6 and AhR strains in LD 12:12 as a function of circadian time. Profiles were generated in the "Activity Profile" module in Clocklab (Actimetrics Corp, Evanston, IL) which averaged the activity profiles for the last eight days under LD 12:12. The gray arrow shows the placement of the siesta. The dark line indicates the mean, the shaded areas are SEM.
Hofstetter et al. Journal of Circadian Rhythms 2007 5:7 doi:10.1186/1740-3391-5-7