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. Author manuscript; available in PMC: 2012 Jan 1.
Published in final edited form as: Clin Neurophysiol. 2010 Jul 8;122(1):114–120. doi: 10.1016/j.clinph.2010.06.010

Fig. 2.

Fig. 2

EEG power spectra from the midline parietal-occipital electrode recorded from 16 healthy adults in resting eyes closed (left) and eyes open (right) conditions, 1.5 hours after administration of alcohol (dotted line), placebo (dark solid line), or caffeine (light solid line). Across both resting conditions, low frequency EEG power in the delta-theta band was larger after alcohol but smaller after caffeine. The ratio of alpha power in the eyes-closed to eyes-open conditions was smaller after alcohol but larger after caffeine. Such changes contributed to the alertness sub-score decreasing after alcohol (p<.05) but increasing after caffeine (p<.01).