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      • Effect analysis of incense on autonomic nerve activity and improvement of working task

        Masaya Kawada,Shin’ichi Tachiwana,Kazushi Iwasa,Takehiko Iwasa,Keisuke Suzuki 대한인간공학회 2016 대한인간공학회 학술대회논문집 Vol.2016 No.06

        In recent years, the effects of fragrance on the mental and physical condition are being discussed. It has been reported that the fragrance has the effects to reduce mental stress and to improve the mental concentration on human. All of these reports investigated the effects of aroma oil on human. Therefore, in this study, we investigated the effects of the incense on the mental and physical condition. The incense is traditional fragrance in Japan. We analyzed the activation of sympathetic nerve in terms of CSI (Cardiac Sympathetic Index) and the activation of parasympathetic nerve in terms of CVI (Cardiac Vagal Index) in order to investigate the fluctuation of autonomic nerve system. At the same time, we analyzed oxyHb concentration which is an index of active state of brain in order to investigate concentration on the mental task. Through these investigations, it was clarified that the incense has the effect to make mind and body relaxed at rest because value of CVI increased when incense was presented. It was suggested that the incense has the effect to quiet down brain because brain blood flow decreased when incense was presented at rest. In addition, it was clarified that the incense improve mental concentration because the performance of work improved when incense was presented. Furthermore, we confirmed the possibility that the restraint of the fluctuation of the sympathetic nerve is related to improvement of the mental concentration because the fluctuation of the value of CSI becomes small at the time of work when incense was presented.

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