0056 EFFECTS OF PRIOR SLEEP DURATION AND AGE ON WAKING ALPHA ELECTROENCEPHALOGRAM POWER IN EARLY ADOLESCENCE

• Published in: Sleep (New York, N.Y.) N.Y.), 2017-04, Vol.40 (suppl_1), p.A21-A22
• Main Authors: Campbell, IG, Kim, EI, Gainer, MA, Karmouta, E, Feinberg, I
• Format: Article
• Language: English
• Subjects: Adolescence; Age; Child development; Electroencephalography; Laboratories; Longitudinal studies; Sleep; Teenagers
• ISSN: 0161-8105; 1550-9109
• DOI: 10.1093/sleepj/zsx050.055

Abstract Introduction: In the waking electroencephalogram (EEG), alpha frequency power increases when eyes are closed, and this increase is diminished following sleep deprivation. Our current longitudinal study varies time in bed (TIB) to determine changes in sleep need across adolescence. Here we report the effects of sleep restriction and age on waking alpha power in early adolescence. Methods: Seventy seven children, age 9.85 to 14.0 years (mean=12.2, sd=1.2) at the time of first recording, were studied in the first year of this ongoing longitudinal study. A laboratory day of performance and sleepiness testing follows four nights with TIB restricted to 7, 8.5 or 10 hours. Each participant completed all three sleep schedules. Laboratory days entailed 4 test sessions, every 2 hours starting at 0900. Each test session includes recording of waking EEG: 3 minutes with eyes open, followed by 2 minutes eyes closed, followed by 2 minutes eyes open, followed by 2 minutes eyes closed. EEG recorded from O1 and O2 was analyzed with FFT on 5 second artifact free epochs. Results: Following the 7 h TIB schedule, O1 alpha power with eyes open (57 µV2) increased (by 114 µV2) when eyes were closed (p0.4 for all). Results for O2 EEG were similar. Conclusion: In young adolescents, sleep restriction diminishes the eyes closed increase in waking alpha EEG power. This finding raises the possibility that alpha power is a sensitive indicator of sleep recovery and encourages further study over a wider age range and sleep durations. The absence of an age effect contrasts starkly with MSLT findings from the same subjects where sleep extension provided a much stronger decrease in sleep likelihood in younger subjects. Support (If Any): R01HL116490.