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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Drug Alcohol Depend. 2016 Apr 18;163:202–208. doi: 10.1016/j.drugalcdep.2016.04.014

Figure 4.

Figure 4

Sleep efficiency as determined by actigraphy in cocaine and control subjects over the course of the week. Activity-based sleep efficiency decreased during cocaine self-administration (n=6; left) compared to Sunday. During the initial 3 weeks at the 3.0mg/kg dose, the reduction was significant from Thursday-Saturday (# P<0.05), whereas during the initial 3 weeks at 4.5mg/kg, activity-based sleep efficiency was significantly reduced from Tuesday-Saturday (* P<0.05). No significant patterns were found in the control group during water self-administration (n=5 right).