Table 1.

Sleep parameters for subjects in overnight sleep study (Experiment 2).

Sleep Parameter	Mean time (min) ± S.E.M	% Total Sleep Time ± S.E.M
Total Sleep Time	461 ± 12
Wake After Sleep Onset	43 ± 10
Sleep Latency	27 ± 7
Stage 1	33 ± 3	7.2 ± 0.7
Stage 2	251 ± 9	54.4 ± 2.0
Stage 3	40 ± 3	8.7 ± 0.7
Stage 4	45 ± 4	9.8 ± 0.9
SWS (Stages 3 + 4)	86 ± 4	18.7 ± 0.9
REM	90 ± 5	19.5 ± 1.1

Note. All measures are in minutes. Sleep Latency = latency to sleep onset (first epoch of sleep). S1-S4, Stages 1-4; SWS, slow wave sleep; REM, Rapid Eye Movement sleep.