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2015 ; 5
(ä): 17159
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Nap sleep spindle correlates of intelligence
#MMPMID26607963
Ujma PP
; Bódizs R
; Gombos F
; Stintzing J
; Konrad BN
; Genzel L
; Steiger A
; Dresler M
Sci Rep
2015[Nov]; 5
(ä): 17159
PMID26607963
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Sleep spindles are thalamocortical oscillations in non-rapid eye movement (NREM)
sleep, that play an important role in sleep-related neuroplasticity and offline
information processing. Several studies with full-night sleep recordings have
reported a positive association between sleep spindles and fluid intelligence
scores, however more recently it has been shown that only few sleep spindle
measures correlate with intelligence in females, and none in males. Sleep spindle
regulation underlies a circadian rhythm, however the association between spindles
and intelligence has not been investigated in daytime nap sleep so far. In a
sample of 86 healthy male human subjects, we investigated the correlation between
fluid intelligence and sleep spindle parameters in an afternoon nap of 100
minutes. Mean sleep spindle length, amplitude and density were computed for each
subject and for each derivation for both slow and fast spindles. A positive
association was found between intelligence and slow spindle duration, but not any
other sleep spindle parameter. As a positive correlation between intelligence and
slow sleep spindle duration in full-night polysomnography has only been reported
in females but not males, our results suggest that the association between
intelligence and sleep spindles is more complex than previously assumed.
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