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. 2005 Oct 12;102(43):15676–15681. doi: 10.1073/pnas.0505414102

Fig. 2.

Fig. 2.

Higher amplitude and prevalence of EEG delta oscillations in stage-4 sleep in an individual with the G/A genotype than in an individual with the G/G genotype. The two subjects are concordant with respect to the A2A receptor (A2A-R) 1976T→ C genotype. The representative 20-s sample of slow-wave sleep was recorded in both subjects 61 min after lights-out and within the first non-REM sleep episode. C3A2, EEG derivation; EOG, bipolar electrooculogram; EMG, submental electromyogram. Horizontal dashed lines below and above the EEG trace indicate 75 μV.