Figure 1.

Representative double-plotted actograms of locomotor activity from Per1-luc transgenic rats fed ad-libitum or under restricted feeding in a 12:12 h light:dark cycle. In the first 5 days all rats were allowed free access to food; one group continued this condition from day 6 to day 15 (A) while another group (B) had a restricted feeding schedule with food available from ZT4 to ZT6 (indicated by the hatched box at the top of the figure inside the bar indicating the L:D cycle). These data are representative of 6 animals.