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Nap sleep spindle correlates of intelligence.

Ujma PP, Bódizs R, Gombos F, Stintzing J, Konrad BN, Genzel L, Steiger A, Dresler M - Sci Rep (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Institute of Behavioural Sciences, Semmelweis University, H-1089 Budapest, Hungary.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus

Scatterplots illustrating the correlation between slow (left panel) and fast(right panel) spindle duration (axis y) and CFT IQ score (axis x) on theelectrode F4 where the effect was found to be the strongest.While the correlation is only significant in case of slow spindle duration,the two correlation coefficients are not statistically different from eachother (Fisher’s z = 3.12,p > 0.1).
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f1: Scatterplots illustrating the correlation between slow (left panel) and fast(right panel) spindle duration (axis y) and CFT IQ score (axis x) on theelectrode F4 where the effect was found to be the strongest.While the correlation is only significant in case of slow spindle duration,the two correlation coefficients are not statistically different from eachother (Fisher’s z = 3.12,p > 0.1).

Mentions: We found a positive correlation between intelligence and slow spindle duration(statistically significant on all electrodes, significant after FDR correction). Atendency for a positive correlation between intelligence and slow spindle density onsome electrodes was also seen, which however was not significant after FDRcorrection. No correlation between intelligence and either sleep spindle amplitudeor frequency was found, and no correlation between intelligence and any of the fastspindle parameters was seen either. However, correlations with intelligence did notdiffer significantly between slow and fast spindles. Intelligence did not correlatesignificantly with any measures of sleep macrostructure. Our results are summarizedin Table 1; the strongest results are illustrated as ascatterplot on Fig. 1. Consistent with the narrow age range ofour subjects, our results did not change significantly if partial correlations(controlling for age) were calculated.


Nap sleep spindle correlates of intelligence.

Ujma PP, Bódizs R, Gombos F, Stintzing J, Konrad BN, Genzel L, Steiger A, Dresler M - Sci Rep (2015)

Scatterplots illustrating the correlation between slow (left panel) and fast(right panel) spindle duration (axis y) and CFT IQ score (axis x) on theelectrode F4 where the effect was found to be the strongest.While the correlation is only significant in case of slow spindle duration,the two correlation coefficients are not statistically different from eachother (Fisher’s z = 3.12,p > 0.1).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4660428&req=5

f1: Scatterplots illustrating the correlation between slow (left panel) and fast(right panel) spindle duration (axis y) and CFT IQ score (axis x) on theelectrode F4 where the effect was found to be the strongest.While the correlation is only significant in case of slow spindle duration,the two correlation coefficients are not statistically different from eachother (Fisher’s z = 3.12,p > 0.1).
Mentions: We found a positive correlation between intelligence and slow spindle duration(statistically significant on all electrodes, significant after FDR correction). Atendency for a positive correlation between intelligence and slow spindle density onsome electrodes was also seen, which however was not significant after FDRcorrection. No correlation between intelligence and either sleep spindle amplitudeor frequency was found, and no correlation between intelligence and any of the fastspindle parameters was seen either. However, correlations with intelligence did notdiffer significantly between slow and fast spindles. Intelligence did not correlatesignificantly with any measures of sleep macrostructure. Our results are summarizedin Table 1; the strongest results are illustrated as ascatterplot on Fig. 1. Consistent with the narrow age range ofour subjects, our results did not change significantly if partial correlations(controlling for age) were calculated.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Institute of Behavioural Sciences, Semmelweis University, H-1089 Budapest, Hungary.

ABSTRACT
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.

No MeSH data available.


Related in: MedlinePlus