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  Hyperarousal captured in increased number of arousal events during pre-REM periods in individuals with frequent nightmares

Blaskovich, B., Reicher, V., Gombos, F., Spoormaker I, V., & Simor, P. (2019). Hyperarousal captured in increased number of arousal events during pre-REM periods in individuals with frequent nightmares. JOURNAL OF SLEEP RESEARCH, e12965. doi:10.1111/jsr.12965.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-F6E5-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-F6E6-2
Genre: Journal Article

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 Creators:
Blaskovich, Borbala1, Author
Reicher, Vivien2, Author
Gombos, Ferenc2, Author
Spoormaker I, Victor1, Author
Simor, Peter2, Author
Affiliations:
1Dept. Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Max Planck Society, Kraepelinstr. 2-10, 80804 Munich, DE, ou_2035295              
2External Organizations, ou_persistent22              

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 Abstract: The aim of this study was to investigate hyperarousal in individuals with frequent nightmares (NM participants) by calculating arousal events during nocturnal sleep. We hypothesized an increased number of arousals in NM participants compared with controls, especially during those periods where the probability of spontaneous arousal occurrence is already high, such as non-rapid eye movement to rapid eye movement transitions (pre-rapid eye movement periods). Twenty-two NM participants and 23 control participants spent two consecutive nights in our sleep laboratory, monitored by polysomnography. Arousal number and arousal length were calculated only for the second night, for 10 min before rapid eye movement (pre-rapid eye movement) and 10 min after rapid eye movement (post-rapid eye movement) periods, as well as non-rapid eye movement and rapid eye movement phases separately. Repeated-measures ANOVA model testing revealed significant Group (NM participants, controls) x Phase (pre-rapid eye movement, post-rapid eye movement) interaction in case of the number of arousals. Furthermore, post hoc analysis showed a significantly increased number of arousals during pre-rapid eye movement periods in NM participants, compared with controls, a difference that disappeared in post-rapid eye movement periods. We propose that focusing the analyses of arousals specifically on state transitory periods offers a unique perspective into the fragile balance between the sleep-promoting and arousal systems. This outlook revealed an increased number of arousals in NM participants, reflecting hyperarousal during pre-rapid eye movement periods.

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 Dates: 2019-12-20
 Publication Status: Published online
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 Identifiers: ISI: 000503598600001
DOI: 10.1111/jsr.12965
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Title: JOURNAL OF SLEEP RESEARCH
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: e12965 Start / End Page: - Identifier: ISSN: 0962-1105