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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: J Sleep Res. 2013 Oct;22(5):10.1111/jsr.12045. doi: 10.1111/jsr.12045

Figure 2.

Figure 2

Effects of amphetamine on sleep in rhesus monkeys. All points represent the mean ± SEM, and any points without error bars indicate instances in which the SEM is encompassed by the data point. Abscissae: Dose of drug expressed as mg/kg and plotted on a logarithmic scale. The points at saline represent administration of the saline vehicle of amphetamine. Ordinates: Latency to the first sleep bout from the commencement of the dark phase (A) or total sleep duration over the entire dark phase (B). A * indicates a significant difference from saline treatment as assessed by Dunnett’s method.