Sleep restriction and age effects on waking alpha EEG activity in adolescents.
Sleep restriction and age effects on waking alpha EEG activity in adolescents.
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睡眠限制和年龄对青少年唤醒αEEG活动的影响。
DOI：
10.1093/sleepadvances/zpac015
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发表时间：
2022
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为了了解青春期睡眠需求的变化，我们的实验室正在进行一项关于睡眠时间对白天嗜睡和表现的影响的纵向剂量反应研究。本报告的重点是清醒α（8-12 Hz）脑电图（EEG）与先前睡眠持续时间的关系，这种关系是否随年龄变化，以及清醒α功率下降是否与白天嗜睡，警惕性和执行功能的变化有关。研究参与者（n = 77）进入研究的年龄范围为9.86至13.98岁，每年进行一次研究，持续3年。每年，参与者连续四晚完成三种卧床时间（TIB）条件（7、8.5或10小时）中的每一种。在第四晚的第二天记录清醒EEG。TIB限制和由此导致的睡眠丧失与α功率降低相关，其中闭眼条件下的效果更强。TIB限制通过增加最大α功率的频率来改变α范围内的功率谱。α功率随着年龄的增长而下降，但TIB限制的效果并没有随着年龄的增长而下降。α功率降低与主观和客观嗜睡的小但显著增加相关，但与警惕性或执行功能的变化无关。我们将睡眠丧失后的α抑郁解释为不完全的睡眠依赖性恢复，导致白天嗜睡。TIB效应没有随年龄的增长而降低，这表明这种睡眠需求测量在青春期早期到中期不会降低。
To understand how sleep need changes across adolescence our laboratory is carrying out a longitudinal dose–response study on the effects of sleep duration on daytime sleepiness and performance. This report focuses on the relation of the waking alpha (8–12 Hz) electroencephalogram (EEG) to prior sleep duration, whether this relation changes with age, and whether decreased waking alpha power is related to changes in daytime sleepiness, vigilance, and executive functioning. Study participants (n = 77) entered the study at ages ranging from 9.86 to 13.98 years and were studied annually for 3 years. Each year participants completed each of three time in bed (TIB) conditions (7, 8.5, or 10 h) for four consecutive nights. Waking EEG was recorded on the day following the fourth night. TIB restriction and resultant sleep loss were associated with reduced alpha power with the effect being stronger for the eyes closed condition. TIB restriction altered the power spectrum within the alpha range by increasing the frequency of maximum alpha power. Alpha power decreased with age, but the effect of TIB restriction did not decrease with age. Reduced alpha power was associated with small but significant increases in subjective and objective sleepiness but was not associated with changes in vigilance or executive functioning. We interpret the alpha depression following sleep loss as incomplete sleep dependent recuperation that contributes to daytime sleepiness. The absence of a decrease in TIB effects with age indicates that this sleep need measure does not decrease over early to mid-adolescence.