{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T21:58:46Z","timestamp":1791669526125,"version":"4.3.4"},"reference-count":60,"publisher":"Oxford University Press (OUP)","issue":"10","funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000027","name":"National Institute on Alcohol Abuse and Alcoholism","doi-asserted-by":"publisher","award":["Y01AA3009"],"award-info":[{"award-number":["Y01AA3009"]}],"id":[{"id":"10.13039\/100000027","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,10,13]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Study Objectives<\/jats:title><jats:p>Sleep deprivation and circadian disruptions impair brain function and cognitive performance, but few studies have examined the effect of sleep inconsistency. Here, we investigated how inconsistent sleep duration and sleep timing between weekends (WE) and weekdays (WD) correlated with changes in behavior and brain function during task and at rest in 56 (30 female) healthy human participants.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>WE\u2013WD differences in sleep duration and sleep midpoint were calculated using 1-week actigraphy data. All participants underwent 3 Tesla blood-oxygen-level-dependent functional Magnetic Resonance Imaging (fMRI) to measure brain activity during a visual attention task (VAT) and in resting-state condition.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>We found that WE\u2013WD inconsistency of sleep duration and sleep midpoint were uncorrelated with each other (r = .08, p = .58) and influenced behavior and brain function differently. Our healthy participants showed relatively small WE\u2013WD differences (WE\u2013WD: 0.59 hours). Longer WE sleep duration (relative to WD sleep duration) was associated with better attentional performance (3-ball: \u03b2 = .30, t = 2.35, p = .023; 4-ball: \u03b2 = .30, t = 2.21, p = .032) and greater deactivation of the default mode network (DMN) during VAT (p &amp;lt; .05, cluster-corrected) and greater resting-state functional connectivity (RSFC) between anterior DMN and occipital cortex (p &amp;lt; .01, cluster-corrected). In contrast, later WE sleep timing (relative to WD sleep timing) (WE\u2013WD: 1.11 hours) was associated with worse performance (4-ball: \u03b2 = \u2212.33, t = \u22122.42, p = .020) and with lower occipital activation during VAT and with lower RSFC within the DMN.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Our results document the importance of consistent sleep timing for brain function in particular of the DMN and provide evidence of the benefits of WE catch-up sleep in healthy adults.<\/jats:p><\/jats:sec>","DOI":"10.1093\/sleep\/zsaa076","type":"journal-article","created":{"date-parts":[[2020,4,25]],"date-time":"2020-04-25T08:55:51Z","timestamp":1587804951000},"source":"Crossref","is-referenced-by-count":41,"title":["Sleep inconsistency between weekends and weekdays is associated with changes in brain function during task and rest"],"prefix":"10.1093","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7481-0917","authenticated-orcid":false,"given":"Rui","family":"Zhang","sequence":"first","affiliation":[{"name":"Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dardo","family":"Tomasi","sequence":"additional","affiliation":[{"name":"Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ehsan","family":"Shokri-Kojori","sequence":"additional","affiliation":[{"name":"Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Corinde 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