• Journal of the Korea Convergence Society
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• v.9 no.3
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• pp.131-135
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• 2018

The purpose of the present study was to examine the effects of full immersion virtual reality (VR) on the autonomic nervous system. The study was conducted with 17 men in their 20s. The subjects were given full immersion VR content, and electrocardiogram (ECG) signals were measured for five minutes before and after the application of the full immersion VR. The autonomic nervous system was evaluated by analyzing the LF, HF, TP, and LF/HF ratio of the ECG signal. The obtained data was analyzed by conducting a paired sample t-test. After applying full immersion VR, the subjects' HF and TP decreased significantly, while their LF/HF ratio increased significantly. According to the results of this study, Full immersion VR provided stress to the autonomic nervous system, but the changes were within the normal range of healthy adults. Therefore, full immersion VR can be safely applied to healthy adults.

• Journal of Industrial Convergence
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• v.22 no.10
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• pp.53-63
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• 2024

This study evaluates the potential effects of the Ceragem spinal thermal massage device on sleep quality and analyzes how its thermal and mechanical massage stimuli influence physiological responses. Clinical studies and case reports suggest that the device's thermal stimulation may help regulate the autonomic nervous system, reduce stress and pain, and potentially improve sleep quality. Additionally, mechanical massage may induce muscle relaxation and stabilize the nervous system, contributing to overall body relaxation. Electromyography (EMG) results indicate that mechanical stimulation may reduce muscle tension and help recalibrate autonomic balance. In conclusion, the Ceragem device shows promise as a non-pharmacological tool for improving sleep quality, though further systematic and rigorous research is needed.

• Progress in Medical Physics
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• v.6 no.2
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• pp.103-109
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• 1995

Power spectral analysis of spontaneous heart rate fluctuations were assessed by use of autooic blocking agents and changes in posture. The total power spectral range of interest is divided amongst the various experiments so that each respiratory pattern contributes a spectral ratio of interval to respiration only over a group of frequencies for which the specific respiratory pattern has substantial, and roughly constant, spectral magnitudes. System hardware is consisted ECG preamplifier, respiratory fluctuation detect, interval time generator and IBC 486PC. High frequency fluctuation, at the respiratiory frequency, are decreased by standing and are mediated solely by the parasympathetic system. Power spectral analysis is a powerful nonivsve tool for quantitying autonomic nervous system activity.

• Journal of TMJ Balancing Medicine
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• v.13 no.sup
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• pp.21-26
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• 2023

Objectives: The purpose of this study is to report the effect of Korean medical treatment with Temporomandibular Joint Balancing Therapy (TBT) on Tic disorder patient with nausea and vomiting. Methods: In this study, Tic disorder patient with nausea and vomiting was treated by Korean medical treatment (acupuncture, herb medicine, etc.), including Temporomandibular Joint Therapy from Feb 28th, 2023 to Jul 10th, 2023. Yale Global Tic Severity Scale (YGTSS) and visual analogue scale (VAS) were used for measuring the Tic disorder and accompanying symptoms. Results: After 32 sessions treatment, the YGTSS decreased from 67 to 0, and VAS associated with Tic disorder, nausea and vomiting also decreased 6 to 0 and 8 to 0 respectively. Conclusions: These results showed that Korean medical treatment with Temporomandibular Joint Balancing Therapy could improve Tic symptoms with nausea and vomiting. But further studies will be needed.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2004.11a
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• pp.30-30
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• 2004

• Science of Emotion and Sensibility
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• v.8 no.1
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• pp.29-36
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• 2005

This study investigated which recumbent posture can give rise to the highest vagal modulation in patients with coronary artery disease(CAD), among three recumbent postures; namely, the supine, left lateral, and right lateral postures. For this purpose, 43 patients as CAD group and 31 patients as control group were studied. Heart rate variability(HRV) was measured on these patients for three recumbent postures in random order Normalized high-frequency power was the highest, whereas normalized low-frequency power was the lowest in the right lateral postures, among the three recumbent postures.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.7
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• pp.4450-4458
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• 2015

The purpose of this study was to examine the influence of the exercise performance of yoga and pilates on the autonomic nervous system in an effort to provide some clinical information on exercise prescription. The subjects were 20 selected college students who majored in P.E. A yoga group and a pilates group were organized with 10 students respectively, the autonomic nervous system of the students was measured before the exercise, immediately after that and 30 minutes after recovery. The findings of the study were as follows: First, there were significant differences in the yoga group's stress index and average pulse according to the main effect of the time and interaction effect between the time and group. Second, there were significant differences in the yoga group's sympathetic nervous system activity and autonomic nerve balance according to all the main effect of the time, interaction effect between the time and group and the main effect of group. Third, there were significant differences in HRV(Heart Rate Variability), parasympathetic nervous system activity, SDNN, and RMSSD according to the main effect of the time, and interaction effect between the time and group and the main effect of group produced no statistically significant differences. In conclusion, yoga seemed to be effective at lowering stress index and average pulse. Specifically, yoga exercise seemed to exert a more positive influence on the decrease of sympathetic nervous system activity and autonomic nerve balance than pilates exercise.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.2005-2006
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• 2008

심박변이도는 자율신경계의 균형 상태를 나타내는 중요한 지표이다. 동적인 환경내에서 항상성을 유지할려는 인체가 각 신경계를 조율하는 수치로 심박의 변화를 시간영역과 주파수영역으로 나누어 그 값을 측정하여 분석하였다. 그 중 심전도의 측정방식에서 간략히 하고자 광학적 방법으로 심장의 박동을 측정하는 PPG 변화량이 심박변이도와 유사하다는 연구가 진행되어 왔다. 하지만, 심전도와 PPG 는 혈압의 영향을 받는다. 본 연구에서 운동부하 실험을 주어 혈압을 상승 시킨뒤, 심전도를 통해 산출한 심박변이도와 PPG를 통해 산출한 맥박변이도를 비교하여 두 상관성에 대하여 연구하였다.

• Journal of Korean Biological Nursing Science
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• v.6 no.2
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• pp.5-17
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• 2004

Purpose: The purpose of this study is to determine effects of aromatherapy on the activity and balance of autonomic nervous system and on physical resistance to stress. Methods: This research is a primitive experimental design which attempts to analyze aromatherapy EKG monitoring on real-time basis. Lavender & Chamomile, each 30 drops, were blended with 100ml Sweet Almond oil. Subjects was laid relaxed, and had insides of his wrists and ankles attached with electrodes for EKG. Right after applied with essential oil onto his philtrum and parotid, started on EKG monitoring. Results: The activities of parasympathetic and sympathetic nerve were changed as time elapsed, with significant differences(p=.000). In multiple comparison, the value was significantly different(p<.05).The balance of autonomic nerve was changed, becoming close to the normal level in accord with applicable international standards(1.5)(p=.011). In multiple comparison, the value showed a significant difference(p<.05). Physical resistance to stress increased with the passage of time, but not statistically significant. Conclusions: This suggests that aromatherapy can be used as a nursing intervention which aims at alleviating symptoms related to the imbalance of autonomic nerve system such as headache, hot flashes, irregular heartbeat, nervousness, depression and anxiety.

• Science of Emotion and Sensibility
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• v.22 no.1
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• pp.55-64
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• 2019

Stress is accompanied by changes in the responses of the autonomic nervous system, and the heart rate variability (HRV) index is a quantitative marker that reflects autonomic responses induced by stressors. In this study, we observed changes in the autonomic responses induced by combinations of 30% oxygen administration and color light for stress relaxation. In all, 42 participants produced stress symptoms over the preceding two weeks, as rated on the stress response scale. After stress assessment, they were exposed to three therapeutic conditions, and electrocardiogram (ECG) signals were recorded before, during, and after therapy. The three therapy conditions consisted of only 30% oxygen administration with white light, a combination of 30% oxygen and orange light, and a combination of 30% oxygen and blue light. The HRV indices extracted from ECG signals were heart rate (HR), the standard deviation of the RR interval (SDNN), the mean square root of consecutive RR interval difference values (RMSSD), the low frequency component of HRV (LF), the high frequency component (HF), and the LF/HF ratio. These indicators were used to compare mean values before and after therapy. The results showed that HR and the LF/HF ratio were significantly lower after therapy than before it. In particular, the condition with 30% oxygen and blue light yielded significantly greater RMSSD and HF increases, as well as decreases in LF/HF ratio than in other two conditions. Our results suggest that therapy with 30% oxygen and blue light is the most effective for the relaxation of stress, which implies autonomic balance by parasympathetic activation.