Favorite odor induces negative dream emotion during rapid eye movement sleep

Sleep Medicine
Satomi OkabeKazuo Yamada

Abstract

As connections between nightmares and various psychiatric disorders have been reported, the clinical significance of studying dream emotionality is now growing in importance. Because the olfactory bulb connects directly to the amygdala odor presentation may be a crucial tool to study dream emotions. Previous studies have demonstrated that presentation of positive/negative odors during rapid eye movement (REM) sleep affects various aspects of dreaming. Although olfactory perception can be influenced by personal experiences, the role of individual preferences in the effects of olfactory stimuli on dreaming has not yet been clarified. The purpose of the current study was to clarify the effects of odor on dreaming during REM sleep, taking individual preferences into account. Phenyl ethyl alcohol (rose-like smell) airflow was presented as an experimental stimulus, and odorless airflow was presented as the control. Participants who like (n = 7) and dislike (n = 8) the odor of phenyl ethyl alcohol were presented air with and without the odor of phenyl ethyl alcohol, respectively, during REM sleep and then awakened to report and rate their dream contents. Thereafter, the transcribed dream reports were rated by independent raters. Parti...Continue Reading

Citations

Nov 28, 2020·Physiology & Behavior·Lenka Martinec NovákováJitka Bušková
Feb 4, 2021·Brain Sciences·Juan Sánchez-Fernández, Luis-Alberto Casado-Aranda
May 21, 2021·Neurobiology of Learning and Memory·Claudia Picard-DelandTore Nielsen

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