• Biomedical Science Letters
• /
• v.24 no.4
• /
• pp.319-328
• /
• 2018

The purpose of this study is to identify the factors influencing the stress of the elderly women by various tools and to provide basic data for adaptation to the aging women. For this purpose, stress was measured by stress measuring equipment (HRV) and stress measurement questionnaire (SRI) in 31 elderly women over 60 years old. In summary, the results of this study suggest that the worse the subjective health, and when there is a spouse, it predicts a stress. In order to reduce the stress of elderly women based on these results, physical health management and environmental factors that can enhance the intimacy between husband and wife are also necessary.

• Journal of Integrative Natural Science
• /
• v.12 no.3
• /
• pp.74-77
• /
• 2019

The purpose of this study is to explore the effects of Chamaecyparis obtusa essential oil on the activity of autonomic nervous system. Heart rate variability (HRV), as an indicator of autonomic nervous system activity and blood pressure were measured before and after inhalation of Chamaecyparis obtusa essential oil. The systolic blood pressure was decreased by inhalation of Chamaecyparis obtusa essential oil (p<0.05). The diastolic blood pressure was not changed significantly by Chamaecyparis obtusa. High frequency (HF) power level was not changed but High frequency/Low frequency (HF/LF) ratio was decreased by Chamaecyparis obtusa essential oil (p<0.05), meaning that parasympathetic nervous system activity was not affected but sympathetic nervous system activity was decreased. These results indicate that Chamaecyparis obtusa essential oil has a modulatory effect on the autonomic nervous system activity.

• Journal of Integrative Natural Science
• /
• v.14 no.3
• /
• pp.95-98
• /
• 2021

By far, studies on the effect of oral administration of peppermint essential oil on blood pressure are not consistent, increasing or decreasing. And the effect of inhalation of peppermint essential oil on blood pressure was not reported. This study was designed to clarify the effect of peppermint essential oil inhalation on the blood pressure and autonomic nervous system. Blood pressure and heart rate variability (HRV) as an indicator of autonomic nervous system activity were measured. The systolic and diastolic blood pressure was not changed significantly by inhalation of peppermint essential oil. Standard deviation of normal to normal (SDNN), a parameter of total activity of autonomic nervous system also was not changed significantly. High frequency (HF) power level, an indicator of parasympathetic nervous system activity was not changed by peppermint. These results indicate that action mechanism of peppermint essential oil on blood pressure is different by the method of administration, oral or inhalation.

• Journal of Oriental Neuropsychiatry
• /
• v.32 no.1
• /
• pp.67-79
• /
• 2021

Objectives: The purpose of this study was to report the effect of Korean medicine treatment on a patient with somatic symptom disorder hospitalized after a traffic accident. Methods: The subject for this study was a patient diagnosed with somatic symptom disorder that worsened after a traffic accident. During hospitalization, herbal medicine, acupuncture, psychotherapy, and other treatments were performed. Clinical effect was evaluated using Heart Rate Variability (HRV), BDI (Beck Depression Inventory)-II, BAI (Beck Anxiety Inventory), Global assessment (G/A), and Numerical rating scale (NRS). Results: After 36 days of treatment, BDI-II score was reduced from 17 to 5. BAI score was reduced from 23 to 8. Overall somatic symptoms and pain showed decreases. Conclusions: Korean medicine treatment might be effective for somatic symptom disorder that is worsened after a traffic accident.

• Journal of Environmental Science International
• /
• v.30 no.1
• /
• pp.1-10
• /
• 2021

The purpose of this study is to verify the physiological and psychological benefits of indoor garden to humans and to analyze the comparison according to Type A behavior pattern. The subjects included 18 male university students. Heart rate variation was used as a parameter of physiological assessment, and Semantic Differential (SD), Profile of Mood States-Brief (POMS), and State-Trait Anxiety Inventory (STAI) were used as tools for psychological evaluation. The participants were subjected to a psychological evaluation when they were present in a garden. As a result, the parasympathetic nervous activity was increased in the indoor garden. In the analysis of psychological evaluation, indoor garden improved the positive mood states and decreased negative feelings with significant changes only in Type A group. This study supported that indoor garden can have physiological and psychological relaxing effects, which could be more significant in Type A group than Type B.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2013.05a
• /
• pp.212-214
• /
• 2013

심전도 데이터는 일반적으로 분류기를 사용한 실험이 많으며, QRS-Complex와 R-R interval 간격을 추출하여 실험한다. 본 연구에서는 R-R interval을 추출하였다. 그리고 R-R interval 데이터와 HRV 데이터를 구성하였고, 베이지안 네트워크 분류기를 사용하여 정확도를 도출하였다. 심장관련 데이터는 심전도 뿐 아니라 심장병 데이터도 있는데 심전도 데이터와 같이 분류실험을 시행하여 정확도를 도출하였다. 그리고 베이지안 네트워크분류기의 정확도를 분석하기 위해 타 논문의 실험결과와 비교하였다. 타 논문과 본 연구의 결과를 비교해보니 베이지안 네트워크가 타 결과에 비해서 정확도 도출이 우수하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2009.04a
• /
• pp.696-698
• /
• 2009

현대인들의 감정 불안정 상태로 인한 질병과 사회문제, 범죄 등이 많은 이슈로 나타나고 있다. 본 논문은 사람의 감정에 따른 생리적인 변화를 생체신호를 측정하여 분석하고 이를 이용하여 사람의 감정을 조절할 수 있는 음악을 선택하여 조절한다. 사람의 심박수를 측정하고 그 데이터를 HRV(심장박동 변화율)로 변환하면 그 사람의 현재 기분을 추정해 낼 수 있다는 연구 결과를 적용하여 기분에 따라 알맞은 음악을 자동으로 선택 하여 들려줄 수 있는 시스템을 설계하고 구현한다.

• Sleep Medicine and Psychophysiology
• /
• v.7 no.2
• /
• pp.96-101
• /
• 2000

Objectives: Through comparing sleep variables and autonomic activities among three shifts in shift workers, the authors intended to clarify which shift is most tolerable and to identify the characteristics of their psychological and physical problems. This study is also expected to help shift workers to adapt themselves to their work more effectively. Methods: Fifty one shift workers took part in this study. They were working in a rapidly rotating system in which they worked for 3 days in one shift with one day off between each shift. Based on a sleep diary, sleep latency (SL), sleep period time (SPT), and number of wake after sleep onset (NWASO) were estimated and compared among the three shifts. In assessing sleepiness, Epworth sleepiness scale (ESS) and visual analogue scale (VAS) were used. To evaluate mood states among the three shifts, profile of mood states (POMS) was administered. Heart rate variability (HRV), and the level of adrenaline and noradrenaline were measured to assess autonomic activities. HRV included low frequency power (LF), high frequency power (HF), and LF/HF. Results: SPT was significantly lengthened during the evening shift and SL was shortened during the night shift. The workers showed a drop in alertness at wake-up during morning shift and a drop in alertness at work during night shift. During night shift the subjects complained of physical fatigue and cognitive decline. Comparison of HRV showed that parasympathetic activity was most prominent during the evening shift. Secretion of adrenaline and noradrenaline decreased during the evening shift, though statistically not significant. Conclusion: We found that the evening shift was most tolerable among the three shifts. It is recommended that morning light exposure be done during the morning shift and nocturnal light exposure during the night shift.

• Sleep Medicine and Psychophysiology
• /
• v.24 no.1
• /
• pp.32-37
• /
• 2017

Objectives: A supine sleep position increases sleep apneas compared to non-supine positions in obstructive sleep apnea syndrome (OSAS). However, supine position time (SPT) is not highly associated with apnea-hypopnea index (AHI) in OSAS. We evaluated the correlation among sleep-related variables and SPT in OSAS. Methods: A total of 365 men with OSAS were enrolled in this study. We analyzed how SPT was correlated with demographic data, sleep structure-related variables, OSAS-related variables and heart rate variability (HRV). Multiple linear regression analysis was conducted to investigate the factors that affected SPT. Results: SPT had the most significant correlation with total sleep time (TST ; r = 0.443, p < 0.001), followed by sleep efficiency (SE ; r = 0.300, p < 0.001). Snoring time (r = 0.238, p < 0.001), time at < 90% SpO2 (r = 0.188, p < 0.001), apnea-hypopnea index (AHI ; r = 0.180, p = 0.001) and oxygen desaturation index (ODI ; r = 0.149, p = 0.004) were significantly correlated with SPT. Multiple regression analysis revealed that TST (t = 7.781, p < 0.001), snoring time (t = 3.794, p < 0.001), AHI (t = 3.768, p < 0.001) and NN50 count (t = 1.993, p = 0.047) were associated with SPT. Conclusion: SPT was more highly associated with sleep structure-related parameters than OSAS-related variables. SPT was correlated with TST, SE, AHI, snoring time and NN50 count. This suggests that SPT is likely to be determined by sleep structure, HRV and the severity of OSAS.

• Science of Emotion and Sensibility
• /
• v.13 no.1
• /
• pp.187-196
• /
• 2010

Recently, people have been suffering from stress-related fatigue and psychological disorders. Most people depend on medicine for pain relief; many treat pain also through alternative medicine or replacement therapy. However, drug therapy has many side effects, including increased stress after the therapy. In comparison, alternative therapies such as massage and foot reflexology are less damaging to the body, and such therapies can be provided without physical or psychological discomfort. In this regard, the author had previously co-developed color foot reflexology, which combines the merits of color therapy and foot reflexology; color foot reflexology has been shown to have beneficial effects without undue pain. This study investigates the effects of color foot reflexology on the physiological response of the body by comparing the body’s response to the signal with that to the placebo. Healthy adult subjects were selected for the experiment, which was conducted under optimal experimental conditions and design. The results indicated that when stimulated, parasympathetic nerves increased in HRV and that blood pressure, pulse, body heat, peripheral blood flow were dramatically activated. However, the results for the placebo indicated minimal changes or irregular outcomes. The results provide strong evidence for the beneficial effects of the color foot reflexology instrument on the autonomic nervous system and on the physiological response of the body. Future research is warranted to verify the results of the current study by examining patients suffering from diseases and disorders arising from irregular physiological functions in the context of the foot.