FIGURE 1.
The effects of scopolamine (SCO) on locomotor activity in WT (M4WT) and KO (M4KO) mice at 9:00 AM (top) and 9:00 PM (bottom). Control mice were treated with physiological solution (saline). Ordinate: counts per hour expressed as % of activity in saline injected mice. #p < 0.05, ###p < 0.001, difference from PM.