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Effect of Laughter Stimuli on Autonomic Nervous System and Its Sustained Effect Ritsuko SHIMIZU 1 , Yayoi KONDO 2 , Yoshifumi MORIYAMA 3 , Sanae TSUKAMOTO 4 , Hisae HAYASHI 5,6 , Junko HOSHINO 1 , Yoko HORI 6 1Sugiyama Jogakuen University Department of Nursing 2Aiiku Hospital 3Nagoya Kyouritsu Hospital 4Nagoya University School of Health Sciences (Formerly) 5Seijoh University 6Nagoya University Graduate School of Medicine Keyword: 笑い , 笑いの持続効果 , 自律神経系 , 唾液アミラーゼ , POMS , laughter , sustained effect of laughter , autonomic nervous system , salivary amylase , Profile of Mood States pp.1-12
Published Date 2012/12/30
DOI https://doi.org/10.11477/mf.7009200076
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Abstract

 Purpose: The aim of this study was to investigate the effect of laughter stimuli on the autonomic nervous system, and its sustained effect, from both physiological and psychological aspects.

 Methods: This study was done together with the "Study on the effect of laughter from the kinesiological perspective" conducted in one hospital during March 2-13, 2009. The participants were 10 female participants(20-40 years old)in the hospital from whom consent was obtained. The physiological indicators were salivary amylase, blood pressure, heart rate, and HRV, while the psychological indicators used were the profile of mood status(POMS)test and a face scale. The experiment was divided into two days. On the first day, the intervention task was for participants to view a comedy DVD, while on the control second day they were asked to gaze at a blue screen.

 Results: During the intervention, salivary amylase decreased significantly from the resting state before the task until 10 min after the task. Twenty min after the task, the level had returned to near the pre-task resting level. In the control no significant change was seen. For heart rate the baseline level was taken to be the mean level over the 3 min immediately preceding the start of the task, compared to which it was significantly elevated during and 10 min after the task in the intervention. The "Tension-Anxiety", "Depression-dejection", "Anger-Hostility", "Fatigue-Inertia", and "Total Mood Disturbance" subscales on the POMS showed significant decreases after the task in the intervention only. The face scale showed a significant decrease only after the intervention task. The "Confusion- Bewilderment" showed significant decreases after the task in the intervention both intervention and control.

 Conclusion: As for the effects of laughter stimuli on the autonomic nervous system, it was suggested from the changes in physiological indictors that activation of the sympathetic nervous system occurs during laughter stimuli, after which there is a switch to enhancement and then inhibition of the parasympathetic nervous system. Moreover the psychological indicators showed that even 20 min after the laughter stimuli there was a sustained effect with decreased negative feelings and improved mood.


Copyright © 2012, Japan Society of Nursing and Health Care All rights reserved.

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電子版ISSN 印刷版ISSN 1345-2606 日本看護医療学会

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