Figure 2: Average daily food intake (a) and body weight (b) in the baseline, experimental, and recovery phase of the experiment for RS ( ), DS ( ), and control ( ) animals. The horizontal grey bars at the bottom of the graphs represent the 8-day period of RS or DS. Data are average values ± SEM. Asterisks indicate a significant difference between sleep disturbed (DS and RS) and control animals ( P < .01).