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Article

Topography of Slow Sigma Power during Sleep is Associated with Processing Speed in Preschool Children

1
Sleep and Development Laboratory, Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA
2
Department of Psychology, University of Edinburgh, Edinburgh EH8 9JZ, UK
3
Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA
*
Author to whom correspondence should be addressed.
These authors contributed equally to the paper and are listed in alphabetical order.
Academic Editor: Marcos Frank
Brain Sci. 2015, 5(4), 494-508; https://doi.org/10.3390/brainsci5040494
Received: 3 August 2015 / Revised: 23 October 2015 / Accepted: 29 October 2015 / Published: 4 November 2015
(This article belongs to the Special Issue Sleep and Brain Development)
Cognitive development is influenced by maturational changes in processing speed, a construct reflecting the rapidity of executing cognitive operations. Although cognitive ability and processing speed are linked to spindles and sigma power in the sleep electroencephalogram (EEG), little is known about such associations in early childhood, a time of major neuronal refinement. We calculated EEG power for slow (10–13 Hz) and fast (13.25–17 Hz) sigma power from all-night high-density electroencephalography (EEG) in a cross-sectional sample of healthy preschool children (n = 10, 4.3 ± 1.0 years). Processing speed was assessed as simple reaction time. On average, reaction time was 1409 ± 251 ms; slow sigma power was 4.0 ± 1.5 μV2; and fast sigma power was 0.9 ± 0.2 μV2. Both slow and fast sigma power predominated over central areas. Only slow sigma power was correlated with processing speed in a large parietal electrode cluster (p < 0.05, r ranging from −0.6 to −0.8), such that greater power predicted faster reaction time. Our findings indicate regional correlates between sigma power and processing speed that are specific to early childhood and provide novel insights into the neurobiological features of the EEG that may underlie developing cognitive abilities. View Full-Text
Keywords: early childhood; preschool children; sleep spindles; sigma power; high density EEG; processing speed; cognition early childhood; preschool children; sleep spindles; sigma power; high density EEG; processing speed; cognition
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MDPI and ACS Style

Doucette, M.R.; Kurth, S.; Chevalier, N.; Munakata, Y.; LeBourgeois, M.K. Topography of Slow Sigma Power during Sleep is Associated with Processing Speed in Preschool Children. Brain Sci. 2015, 5, 494-508. https://doi.org/10.3390/brainsci5040494

AMA Style

Doucette MR, Kurth S, Chevalier N, Munakata Y, LeBourgeois MK. Topography of Slow Sigma Power during Sleep is Associated with Processing Speed in Preschool Children. Brain Sciences. 2015; 5(4):494-508. https://doi.org/10.3390/brainsci5040494

Chicago/Turabian Style

Doucette, Margaret R., Salome Kurth, Nicolas Chevalier, Yuko Munakata, and Monique K. LeBourgeois 2015. "Topography of Slow Sigma Power during Sleep is Associated with Processing Speed in Preschool Children" Brain Sciences 5, no. 4: 494-508. https://doi.org/10.3390/brainsci5040494

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