Abstract：
STUDY OBJECTIVES:The objective of this study was to investigate whether nightmare (NM) sufferers exhibit an abnormal network of emotional semantic associations as measured by a recently developed, rapid eye movement (REM) sleep-sensitive, associational breadth (AB) task. DESIGN:NM sufferers were compared to healthy controls (CTL) for their performance on an emotional AB task containing positive and negative cue words both before and after a nap with REM sleep. AB was assessed in both a priming condition, where cue words were explicitly memorized before sleep, and a non-priming condition, where cue words were not memorized. Performance was assessed again 1 week later. SETTING:The study was conducted in a sleep laboratory with polysomnographic recording at the Hôpital du Sacré-Coeur de Montréal PARTICIPANTS:Twenty-eight participants between the ages of 18 and 35 years (Mage = 23.3 ± 3.4) were included in the study. MEASUREMENTS AND RESULTS:The NM group scored higher than the CTL group on both positive and negative AB, with group differences persisting at the 1-week retest. However, the two groups did not differ as expected in the AB priming effect following REM sleep. Both groups showed decreased REM sleep-related AB priming for negative cue words and increased AB priming for positive cue words. However, the NM group maintained these effects 1 week later, whereas the CTL group did not. CONCLUSIONS:NM sufferers may access broader than normal emotional semantic networks in the wake state, a difference that may lead to this group being perceived as more creative. The fact that the AB priming effect is maintained at the 1-week retest for NM sufferers suggests that the presence of frequent NMs may alter REM sleep-dependent emotional processes over time.
journal_name
Sleep Medjournal_title
Sleep medicineauthors
Carr M,Blanchette-Carrière C,Marquis LP,Ting CT,Nielsen Tdoi
10.1016/j.sleep.2015.11.013subject
Has Abstractpub_date
2016-04-01 00:00:00pages
80-7eissn
1389-9457issn
1878-5506pii
S1389-9457(15)02064-Xjournal_volume
20pub_type
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