{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:13:21Z","timestamp":1790763201161,"version":"4.1.0"},"reference-count":51,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[2022,11,29]],"date-time":"2022-11-29T00:00:00Z","timestamp":1669680000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/501100001677","name":"Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001677","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001665","name":"Agence Nationale de la Recherche","doi-asserted-by":"publisher","award":["ANR-10-IAIHU-06"],"award-info":[{"award-number":["ANR-10-IAIHU-06"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001665","name":"Agence Nationale de la Recherche","doi-asserted-by":"publisher","award":["ANR-11-INBS-0006"],"award-info":[{"award-number":["ANR-11-INBS-0006"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,2,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Dream\u2019s emotions could exert a major role in desensitizing negative emotions. Studying emotional dynamics (how emotions fluctuate across time) during rapid eye movement (REM) sleep could provide some insight into this function. However, studies so far have been limited to dream reports. To bypass this limit, REM sleep behavior disorder (RBD), in which participants enact their dreams, enables direct access to overt emotional dream behaviors (such as facial expressions and speeches). In total, 17 participants with RBD, and 39.7 h of REM sleep video were analyzed. The frequency of emotional behaviors did not differ between REM sleep episodes of early and late night. Within individual REM sleep episodes, emotional behaviors exhibited a biphasic temporal course, including an increased frequency for the first 10 min, followed by a progressive decrease. The negative emotional behaviors occurred earlier (mean time: 11.3 \u00b1 10 min) than positive (14.4 \u00b1 10.7 min) and neutral behaviors (16.4 \u00b1 11.8 min). Emotional behaviors of opposing (negative and positive) valences were observed in 31% (N = 14) of episodes containing at least one emotional behavior, and were separated by a median time of 4.2 [1.1\u201310.9] min. The biphasic temporal course of behaviors in REM sleep could include the generation reactivation of emotional content during the ascending phase, followed by processing and extinction during the descending phase. The earlier occurrence time of negative emotional behavior suggests that negative emotions may need to be processed first. The rapid succession of emotions of opposite valence could prevent prolonged periods of negative emotions and eventually nightmares.<\/jats:p>","DOI":"10.1093\/sleep\/zsac285","type":"journal-article","created":{"date-parts":[[2022,11,29]],"date-time":"2022-11-29T18:19:57Z","timestamp":1669745997000},"source":"Crossref","is-referenced-by-count":12,"title":["The dynamics of emotional behaviors in rapid eye movement sleep"],"prefix":"10.1093","volume":"46","author":[{"given":"Luc","family":"Masset","sequence":"first","affiliation":[{"name":"Sleep Disorder Unit, Piti\u00e9-Salp\u00eatri\u00e8re University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Milan","family":"Nigam","sequence":"additional","affiliation":[{"name":"Sleep Disorder Unit, Piti\u00e9-Salp\u00eatri\u00e8re University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"},{"name":"Center for Advanced Research in Sleep Medicine, H\u00f4pital du Sacr\u00e9-Coeur , Montr\u00e9al , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Ladarre","sequence":"additional","affiliation":[{"name":"Sleep Disorder Unit, Piti\u00e9-Salp\u00eatri\u00e8re University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"},{"name":"Paris Brain Institute (ICM) , Paris , France"},{"name":"AP-HP, Sorbonne University , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marie","family":"Vidailhet","sequence":"additional","affiliation":[{"name":"Paris Brain Institute (ICM) , Paris , France"},{"name":"AP-HP, Sorbonne University , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9556-4527","authenticated-orcid":false,"given":"Smaranda","family":"Leu-Semenescu","sequence":"additional","affiliation":[{"name":"Sleep Disorder Unit, Piti\u00e9-Salp\u00eatri\u00e8re University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"},{"name":"Paris Brain Institute (ICM) , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philippe","family":"Fossati","sequence":"additional","affiliation":[{"name":"Paris Brain Institute (ICM) , Paris , France"},{"name":"AP-HP, Sorbonne University , Paris , France"},{"name":"Department of Psychiatry, Piti\u00e9-Salp\u00eatriere University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2240-2516","authenticated-orcid":false,"given":"Isabelle","family":"Arnulf","sequence":"additional","affiliation":[{"name":"Sleep Disorder Unit, Piti\u00e9-Salp\u00eatri\u00e8re University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"},{"name":"Paris Brain Institute (ICM) , Paris , France"},{"name":"AP-HP, Sorbonne University , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean-Baptiste","family":"Maranci","sequence":"additional","affiliation":[{"name":"Sleep Disorder Unit, Piti\u00e9-Salp\u00eatri\u00e8re University Hospital, Assistance Publique H\u00f4pitaux de Paris , Paris , France"},{"name":"Paris Brain Institute (ICM) , Paris , France"},{"name":"AP-HP, Sorbonne University , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2022,11,29]]},"reference":[{"issue":"1","key":"2023020806522535900_CIT0001","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.concog.2014.01.011","article-title":"I know how you felt last night, or do I? 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