Fig. 3.

Double-raster plots for activity rhythms (actograms) over 49 days in B-SAP (n = 10) and Lep-SAP (n = 12) rats. Rats were maintained in 12:12-h light-dark (LD) for 13 days and, thereafter, maintained in dark:dark (DD). During DD rats had ad libitum access to food for 13 days to assess photically driven feeding rhythms, then access to food was restricted to food 4 h per day from 9 AM until 1 PM (white box) for 10 days to measure entrainment, followed immediately by a 3-day fast to evaluate persistence of rhythms. After the fast, the rats were returned to ad libitum feeding. The light bar marks the light/dark status of the rats during LD. A and B: collective batch actograms for B-SAP and Lep-SAP rats, respectively. C and D: actograms for an individual B-SAP or Lep-SAP rat, respectively.