Abstract：
:Alertness and performance on a wide variety of tasks are impaired immediately upon waking from sleep due to sleep inertia, which has been found to dissipate in an asymptotic manner following waketime. It has been suggested that behavioural or environmental factors, as well as sleep stage at awakening, may affect the severity of sleep inertia. In order to determine the time course of sleep inertia dissipation under normal entrained conditions, subjective alertness and cognitive throughput were measured during the first 4 h after habitual waketime from a full 8-h sleep episode on 3 consecutive days. We investigated whether this time course was affected by either sleep stage at awakening or behavioural/environmental factors. Sleep inertia dissipated in an asymptotic manner and took 2-4 h to near the asymptote. Saturating exponential functions fitted the sleep inertia data well, with time constants of 0.67 h for subjective alertness and 1.17 h for cognitive performance. Most awakenings occurred out of stage rapid eye movement (REM), 2 or 1 sleep, and no effect of sleep stage at awakening on either the severity of sleep inertia or the time course of its dissipation could be detected. Subjective alertness and cognitive throughput were significantly impaired upon awakening regardless of whether subjects got out of bed, ate breakfast, showered and were exposed to ordinary indoor room light (approximately 150 lux) or whether subjects participated in a constant routine (CR) protocol in which they remained in bed, ate small hourly snacks and were exposed to very dim light (10-15 lux). These findings allow for the refinement of models of alertness and performance, and have important implications for the scheduling of work immediately upon awakening in many occupational settings.
journal_name
J Sleep Resjournal_title
Journal of sleep researchauthors
Jewett ME,Wyatt JK,Ritz-De Cecco A,Khalsa SB,Dijk DJ,Czeisler CAdoi
10.1111/j.1365-2869.1999.00128.xsubject
Has Abstractpub_date
1999-03-01 00:00:00pages
1-8issue
1eissn
0962-1105issn
1365-2869journal_volume
8pub_type
杂志文章abstract：:This study examines whether the benefits of a short midday nap on habitual nappers' mental performance depend on the cognitive domain and the task difficulty. Eighteen healthy college students with the long-term habit of a midday nap (13:00-14:00 hours) participated in a nap-deprivation study. On two separate days wit...
journal_title：Journal of sleep research
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journal_title：Journal of sleep research
pub_type： 杂志文章
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journal_title：Journal of sleep research
pub_type： 共识发展会议,指南,杂志文章
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journal_title：Journal of sleep research
pub_type： 杂志文章
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更新日期：2014-02-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
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journal_title：Journal of sleep research
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journal_title：Journal of sleep research
pub_type： 杂志文章
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/j.1365-2869.2008.00699.x
更新日期：2009-03-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 临床试验,杂志文章
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更新日期：2001-03-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/j.1365-2869.2008.00629.x
更新日期：2008-03-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/j.1365-2869.2006.00543.x
更新日期：2006-09-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/jsr.12326
更新日期：2015-12-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/jsr.12706
更新日期：2019-06-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/j.1365-2869.2011.00959.x
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journal_title：Journal of sleep research
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pub_type： 杂志文章,评审
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journal_title：Journal of sleep research
pub_type： 临床试验,杂志文章
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journal_title：Journal of sleep research
pub_type： 杂志文章
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journal_title：Journal of sleep research
pub_type： 杂志文章,评审
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更新日期：2020-11-12 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
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更新日期：1998-09-01 00:00:00
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journal_title：Journal of sleep research
pub_type： 杂志文章
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journal_title：Journal of sleep research
pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sleep research
pub_type： 杂志文章
doi：10.1111/j.1365-2869.2008.00625.x
更新日期：2008-03-01 00:00:00
