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KMID : 0386520140220020081
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Research Institute of Korean Medicone
2014 Volume.22 No. 2 p.81 ~ p.92
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A Study on Effects of Cyperus rotundus L. Essential Oil Inhalation on Stress Relaxation with HRV, EEG
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Um Ji-Tae
Bae Seon-Young
Park Kil-Soon
Kim Kyoung-Shin
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Abstract
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Objective : The purpose of this study was to assess the effects of Cyperus rotundus L. essential oil on relaxation in highly stressed volunteers with heart rate variability(HRV) and electroencephalography(EEG).
Methods : 11 highly stressed volunteers participated in this study. The volunteers were examined with HRV and EEG before and after inhalation of Cyperus rotundus L. essential oil.
Results : After smelling Cyperus rotundus L. essential oil, mean RR(mean of RR intervals) was incresed significantly(p<0.01), mean HRV(mean of heart rate), HF(high frequency) were decreased significantly(p<0.01). norm LF(low frequency), LF/HF ratio were decreased significantly(p<0.05), norm HF(normalized high frequency) was increased significantly(p<0.05) on HRV. After smelling Cyperus rotundus L. essential oil, relative theta power was decreased significantly(p<0.05) at P3(left parietal) and relative alpha power was increased significantly(p<0.05) at Fp1(left prefrontal), Fp2(right prefrontal) and relative betapower was decreased significantly(p<0.05) at Fp1(left prefrontal) and relative gamma power was decreased significantly(p<0.05) at Fp1(left prefrontal) on EEG.
Conclusions : This results show that inhalation of Cyperus rotundus L. essential oil effects on relaxation and decreasing stress.
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KEYWORD
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Cyperus rotundus L. , essential oil , heart rate variability(HRV) , electroencephalography(EEG)
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