Nocturnal sustained attention during sleep deprivation can be predicted by specific periods of subjective daytime alertness in normal young humans.
J Sleep Res. 2006-03-01; 15(1): 41-45
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1. J Sleep Res. 2006 Mar;15(1):41-5.
Nocturnal sustained attention during sleep deprivation can be predicted by
specific periods of subjective daytime alertness in normal young humans.
Taillard J(1), Moore N, Claustrat B, Coste O, Bioulac B, Philip P.
(1)CNRS UMR5543, Université Victor Segalen Bordeaux 2, France.
J Sleep Res. 2006 Jun;15(2):239.
In our 24-h society, nocturnal sleep-related accidents are common. Because all
individuals are not equal in their responses to sleep loss, it is very important
to identify predictors of vulnerability to sleep deprivation in normal subjects.
We investigated the performance of a cognitive test of sustained attention,
electroencephalogram theta/alpha power, subjective sleepiness, and two circadian
markers (core temperature and melatonin) in 18 healthy men (nine morning types
and nine evening types, 21.4 +/- 1.9 years) during a 36-h sleep deprivation in a
constant routine protocol. Sleep need (self-reported) and baseline sleep
structure were also investigated. Nighttime performance impairment was defined as
the difference between the mean nocturnal number of lapses (00:00-07:30
[corrected] hours) and the mean diurnal number of lapses (07:30-20:30 hours)
expressed as a percentage. Feeling fully alert in the morning just after
awakening and/or sleepy in early afternoon were the only two factors (Multiple R
> 0.80, > 60% of explained variance) which better predicted the decrease in
performances of nocturnal operational tasks requiring sustained attention.
PMID: 16490001 [Indexed for MEDLINE]