{"id":1970,"date":"2022-11-14T16:00:49","date_gmt":"2022-11-14T15:00:49","guid":{"rendered":"https:\/\/semmelweis.hu\/psychophysiology\/?p=1970"},"modified":"2022-11-14T16:29:04","modified_gmt":"2022-11-14T15:29:04","slug":"overnight-dynamics-in-scale-free-and-oscillatory-spectral-parameters-of-nrem-sleep-eeg","status":"publish","type":"post","link":"https:\/\/semmelweis.hu\/psychophysiology\/2022\/11\/14\/overnight-dynamics-in-scale-free-and-oscillatory-spectral-parameters-of-nrem-sleep-eeg\/","title":{"rendered":"Overnight dynamics in scale-free and oscillatory spectral parameters of NREM sleep EEG"},"content":{"rendered":"<p><strong>Overnight dynamics in scale-free and oscillatory spectral parameters of NREM sleep EEG<\/strong><\/p>\n<p>EEG. Scientific Reports 12: 18409 (2022)<\/p>\n<p>DOI: <a href=\"https:\/\/doi.org\/10.1038\/s41598-022-23033-y\" target=\"_blank\" rel=\"noopener\">10.1038\/s41598-022-23033-y<\/a><\/p>\n<p>Csenge G. Horv\u00e1th<sup>1<\/sup>, Orsolya Szal\u00e1rdy<sup>1,2<\/sup>, P\u00e9ter P. Ujma<sup>1<\/sup>, P\u00e9ter Simor<sup>3,4<\/sup>, Ferenc Gombos<sup>5,6<\/sup>, Ilona Kov\u00e1cs<sup>6<\/sup>, Martin Dresler<sup>7<\/sup>, R\u00f3bert B\u00f3dizs<sup>1<\/sup><\/p>\n<p><sup>1<\/sup>Institute of Behavioural Sciences, Semmelweis University, Budapest, Hungary<\/p>\n<p><sup>2<\/sup>Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Budapest, Hungary<\/p>\n<p><sup>3<\/sup>Institute of Psychology, ELTE, E\u00f6tv\u00f6s Lor\u00e1nd University, Budapest, Hungary<\/p>\n<p><sup>4<\/sup>UR2NF, Neuropsychology and Functional Neuroimaging Research Unit at CRCN-Center for Research in Cognition and Neurosciences and UNI-ULB Neurosciences Institute, Universit\u00e9 Libre de Bruxelles (ULB), Brussels, Belgium<\/p>\n<p><sup>5<\/sup>Laboratory for Psychological Research, P\u00e1zm\u00e1ny P\u00e9ter Catholic University, Budapest, Hungary<\/p>\n<p><sup>6<\/sup>ELRN-ELTE-PPKE Adolescent Development Research Group, Faculty of Education and Psychology, E\u00f6tv\u00f6s Lor\u00e1nd University, Budapest, Hungary<\/p>\n<p><sup>7<\/sup>Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands<\/p>\n<p><strong>Abstract<\/strong><\/p>\n<p>Unfolding the overnight dynamics in human sleep features plays a pivotal role in understanding sleep regulation. Studies revealed the complex reorganization of the frequency composition of sleep electroencephalogram (EEG) during the course of sleep, however the scale-free and the oscillatory measures remained undistinguished and improperly characterized before. By focusing on the first four non-rapid eye movement (NREM) periods of night sleep records of 251 healthy human subjects (4\u201369\u00a0years), here we reveal the flattening of spectral slopes and decrease in several measures of the spectral intercepts during consecutive sleep cycles. Slopes and intercepts are significant predictors of slow wave activity (SWA), the gold standard measure of sleep intensity. The overnight increase in spectral peak sizes (amplitudes relative to scale-free spectra) in the broad sigma range is paralleled by a U-shaped time course of peak frequencies in frontopolar regions. Although, the set of spectral indices analyzed herein reproduce known age- and sex-effects, the interindividual variability in spectral slope steepness is lower as compared to the variability in SWA. Findings indicate that distinct scale-free and oscillatory measures of sleep EEG could provide composite measures of sleep dynamics with low redundancy, potentially affording new insights into sleep regulatory processes in future studies.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overnight dynamics in scale-free and oscillatory spectral parameters of NREM sleep EEG EEG. Scientific Reports 12: 18409 (2022) DOI: <a href=\"https:\/\/doi.org\/10.1038\/s41598-022-23033-y\" target=\"_blank\" rel=\"noopener\">10.1038\/s41598-022-23033-y<\/a> Csenge G. Horv\u00e1th1, Orsolya Szal\u00e1rdy1,2, P\u00e9ter P. Ujma1, P\u00e9ter Simor3,4, Ferenc Gombos5,6, Ilona Kov\u00e1cs6, Martin Dresler7, R\u00f3bert B\u00f3dizs1 1Institute of Behavioural Sciences, Semmelweis University, Budapest, Hungary 2Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural &hellip;<\/p>\n","protected":false},"author":101277,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,141],"tags":[],"class_list":["post-1970","post","type-post","status-publish","format-standard","hentry","category-articles-in-professional-journals","category-most-recent-articles"],"acf":[],"_links":{"self":[{"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/posts\/1970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/users\/101277"}],"replies":[{"embeddable":true,"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/comments?post=1970"}],"version-history":[{"count":4,"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/posts\/1970\/revisions"}],"predecessor-version":[{"id":1982,"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/posts\/1970\/revisions\/1982"}],"wp:attachment":[{"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/media?parent=1970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/categories?post=1970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/semmelweis.hu\/psychophysiology\/wp-json\/wp\/v2\/tags?post=1970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}