Author:
Sun Minkai,Nakashima Taisuke,Yoshimura Yuri,Honden Akiyoshi,Nakagawa Toshinori,Nakashima Yu,Kawaguchi Makoto,Takamori Yukimitsu,Koshi Yoshitaka,Sawada Rimpei,Nishida Shinsuke,Ohnuki Koichiro,Shimizu Kuniyoshi
Abstract
This study compared the participants’ physiological responses and subjective evaluations of air scented with different concentrations of common rush (Juncus effusus L. var. decipiens Buchen.) (30 g and 15 g, with fresh air as a control). We asked 20 participants to complete a series of visual discrimination tasks while inhaling two different air samples. We evaluated (1) brain activity, (2) autonomic nervous activity, and (3) blood pressure and pulse rate, (4) in combination with self-evaluation. In addition, we quantified the concentrations of volatile organic compounds. The participants reported the scent to be sour, pungent, and smelly; this impression was likely caused by hexanal and acetic acid. Although the self-evaluations showed that participants did not enjoy the scent, their alpha amplitudes of electroencephalogram and parasympathetic nervous activity were increased, suggesting that participants were relaxed in this atmosphere. Moreover, a lower concentration resulted in a greater induction of relaxation. While the air was not pleasant-smelling, the volatile organic compounds present had a positive psychophysiological impact.
Funder
NARO Bio- oriented Technology Research Advancement Institution the special scheme project on regional developing strategy
Subject
Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health
Cited by
1 articles.
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