• Journal of Magnetics
• /
• 제17권2호
• /
• pp.133-137
• /
• 2012

We investigated the effects of pulsed magnetic fields (PMF) stimulus on electroencephalogram (EEG) alpha activity and heart rate variability (HRV) from electrocardiogram (ECG) measurements with various stimulus durations at acupoint PC9. The alpha activity in the EEG and the ratio of low frequency power and high frequency power (LHR) in the HRV, a reflection of sympathovagal activity, were increased and decreased, respectively, after PMF stimulus of 3 min. Our spectral analysis quantitatively proved that the changes in the EEG alpha activity were consistent with an autonomic function in the ECG. These findings suggest that appropriate PMF stimulus results in the same effect as that of acupuncture applied to the acupoint PC9, which is closely related to the parasympathetic activity of the autonomic nervous system.

• 대한한방소아과학회지
• /
• 제27권3호
• /
• pp.1-11
• /
• 2013

Objectives The purpose of this study is to evaluate the characteristics of autonomic nervous system in heart-weakened children via analyzing heart rate variability (HRV) compare to healthy children. Methods Among the children who have visited the department of pediatrics at OO oriental medicine hospital, the subjects were composed of 62 elementary school students without cardiac disorder, who have yet develop secondary sexual characteristics. Results 1. Mean HRT and SDNN of the heart-weakened group of children were lower than the healthy group, but with no statistical significance. 2. Heart-weakened children had higher LF norm and LF/HF ratio, but lower HF norm than healthy children. The rest of the Frequency Domain Index have no significant differences. 3. Heart-weak score showed a positive correlation with Mean HRT and LF/HF ratio. Conclusions Heart-weakened children had an imbalance in autonomic nervous system due to increase of sympathetic nerve activity and decrease of parasympathetic nerve activity.

• 동의생리병리학회지
• /
• 제29권5호
• /
• pp.409-415
• /
• 2015

This study compared the heart rate variability tests of healthy college students and chronic fatigue patients for 2 years. Study subjects were idiopathic chronic fatigue patients who carried out the HRV tests and students conducted HRV test when health screening test. Study subjects were 250 people, 104 people and men (41.6%), women were 146 patients (58.4%). In patient group, the autonomic nervous system activity was decreased, the activity of the sympathetic nerve and the parasympathetic nerve were significantly reduced compared to the control group(Patient:84.17±16.27, Control:98.33±17.28). Regardless of gender, patient group's autonomic nervous system activity was decreased, the activity of the sympathetic nerve and the parasympathetic nerve were significantly reduced, compared to the control group(Patient Female:84.17±16.27, Patient Male:84.07±14.96/Control Female:98.33±17.28, Control Male:96.45±16.92). Even though same ages, patient group's autonomic nervous activity was reduced compared to control group(Patient:89.36±12.43, Control:97.39±16.91). Fatigue patients' activity of the sympathetic nerve and the parasympathetic nerve were significantly reduced, regardless of the fact that activity of the sympathetic nerve is increased and the parasympathetic nerve is decreased in stress state like an impassioned injury(七情傷). Therefore HRV test is useful to diagnose Fatigue from this study.

• 기본간호학회지
• /
• 제17권4호
• /
• pp.531-538
• /
• 2010

Purpose: This study was done to identify the effects of Qi hand reflexology on autonomic nerve activity in patients admitted to hospital. Method: A non-equivalent control group and quasi-experimental research with pre/post test design were used and 59 patients on a medical ward were assigned to either the experimental group (32) or the control group (27). The study variables included vital signs, autonomic nerve activities (ALF (absolute low frequency), AHF (absolute high frequency), nLF (normalized low frequency), nHF (normalized high frequency), SDNN (standard deviation of all normal-normal intervals)) and were evaluated using the QECG-3 system. The experimental group was treated with Qi hand reflexology for 10 minutes per day, for 3days. Results: Skin temperature and systolic blood pressure in the experimental decreased with treatment. ALF, AHF and SDNN for the experimental group increased with regulating proportion (nLF: nHF=6:4) and a significant difference between the groups was observed. Conclusion: The results indicated that application of Qi hand reflexology for patients in the hospital is effective in regulating the autonomic nervous system activation. Implication of finding should be useful for future research.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
• /
• pp.1639-1642
• /
• 1997

In this paper, the autonomic function analysis system was designed to noninvasively assess the autonomic function of cardiovascular system. Orthostatic stress protocol was designed to stimulate the autonomic nervous system. designed protocol and analysis algorithm were evaluated by experiments for 25 normal subjects and 22 hemiplegia patients. Data were processed by usign the power spectral analysis. Nwe indexes of autonomic function, LF$_{N}$ and HF$_{N}$, were proposed and were compared with LF/HF ratio. New indexes of the sympathetic and parasympathetic activity, respectively. The IST and the DPT are balanced and have positive value for normal subjects during orthostatic stress but not for hempilegia patients. This result suggest that the IST and the DPT are used as new criteria of normal autonomic function during orthostatic stress.ess.

• 대한한방부인과학회지
• /
• 제21권3호
• /
• pp.99-110
• /
• 2008

Purpose: Premenstrual syndrome(PMS) is a collection of physical, psychological and emotional symptoms related to a women's menstrual cycle. The symptoms are related with Autonomic Nervous system. The purpose of this study is to investigate the activity of Autonomic Nervous system in women with premenstrual syndrome(PMS) by using Heart Rate Variability(HRV). Methods: We studied 26 patients visiting ㅇㅇ hospital from 26th December 2005 to 26th April 2006. Activity of Autonomic Nervous system was assesed by means of Heart Rate Variability(HRV). The subjects were categorized in two groups, PMS group(10) and non-PMS group(16). We studied the difference of HRV between two groups by Mann-Whitney U-test using SPSS for windows (version 12.0). Results: SDNN of PMS group was non-significantly lower than non-PMS group. RMS-SD of PMS group was significantly lower than non-PMS group. Mean PR of PMS group was non-significantly higher than non-PMS group. TP, VLF, LF, HF norm of PMS group was non-significantly lower than non-PMS group. HF of PMS group was significantly lower than non-PMS group. LF norm, LF/HF ratio of PMS group was non-significantly higher than non-PMS group. Conclusion: The results suggest that PMS can be related to decreased activity of parasympathetic nervous system. HRV can be useful to diagnose PMS. The more studies to diagnose PMS would be needed.

• 대한한의진단학회지
• /
• 제15권2호
• /
• pp.127-140
• /
• 2011

Objectives: Acupuncture has been shown to relieve pain and modulate biological function by stimulating the organ-specific meridians and enhances parasympathetic activity and suppresses sympathetic activity. The aim of this review is to summarize and understand the effects of acupuncture on autonomic nervous system. Methods: We reviewed a total of 29 studies published from 2000 to 2010 searched by PueMed and various domestic oriental medicine journals to obtain acupuncture studies related with ANS. Each article was classified by ANS measurement index and reviewed for study objectives, outcomes, acupuncture points, experimental and control interventions. Results: In the study of acupuncture about EEG, HRV, SCR, the experiment results are not the same by acupoints. Although same acupoint the results differ by subject's condition. But the study showed some clear tendency. In brief, in normal states acupuncture enhanced either vagal or sympathetic tone depending on the stimulated acupuncture point sites. On the other hand, most of studies demonstrated that acupuncture restored the autonomic dysfunctions in various kinds of tired or stressful states. Conclusions: We reviewed studies that contributed to an understanding of the effects and mechanisms of acupuncture on autonomic nervous system. Although the relationship between acupuncture and ANS response is still uncertain, acupuncture could be a excellent treatment method for modulating autonomic dysfunction.

• 한국산학기술학회논문지
• /
• 제16권7호
• /
• pp.4450-4458
• /
• 2015

본 연구의 목적은 Yoga와 Pilates 운동 수행이 자율신경계에 미치는 영향을 분석하여 운동처방의 임상적 기초 자료를 제공하고자 하였다. 피험자는 체육전공 대학생 20명을 요가운동군(Yoga Group)과 필라테스운동군(Pilates Group)에 각각 10명씩 배정하였고, 자율신경계 측정은 운동 전, 운동 직후, 회복기 30분 후에 이루어졌다. 그 결과 첫째, 요가는 스트레스 지수와 평균맥박이 시기의 주효과와 시기와 집단의 상호작용효과의 유의한 차이를 보였다. 둘째, 요가는 교감활성과 자율신경균형이 시기의 주효과, 시기와 집단의 상호작용효과, 집단의 주효과 모두 유의한 차이를 보였다. 셋째, 맥박다양성, 부교감활성도, SDNN, RMSSD는 시기의 주효과는 유의한 차이를 보였고, 시기와 집단의 상호작용효과와 집단의 주효과는 통계적으로 유의한 차이를 나타내지 않았다. 따라서 요가는 스트레스 지수를 낮추고 평균맥박 감소의 효과를 얻을 수 있으며, 특히 요가 운동이 필라테스 운동보다 교감활성 감소와 자율신경균형에 더 긍정적인 영향을 미치는 것으로 사료된다.

• 대한의용생체공학회:의공학회지
• /
• 제44권1호
• /
• pp.33-40
• /
• 2023

Transcutaneous auricular vagus nerve stimulation (taVNS) is known to be effective in improving symptoms of numerous diseases such as depression and epilepsy by increasing vagus nerve activity through electrical stimulation. The purpose of this study is to investigate the effect of vagus nerve stimulation on the activity of autonomic nervous system and the changes in postprandial blood glucose levels. Seven healthy adults participated in a non-invasive transcutaneous auricular vagus nerve stimulation experiment. taVNS (25 Hz, 200 ㎲, biphasic pulse) was applied to the cymba concha (taVNS group) or the earlobe (Sham-taVNS group) of the left ear. As autonomic nervous system signals, skin conductance level, skin temperature, and heart rate were recorded during the application of taVNS. Postprandial blood glucose changes due to food intake were recorded at 5 min intervals for 25 minutes after taVNS or sham-taVNS. The taVNS showed a significantly lower skin conductance level than the shamtaVNS (p < 0.05). The increase rate of postprandial blood glucose was significantly lower in the taVNS than in the sham-taVNS (p < 0.05). These results showed that taVNS reduced the activity of the sympathetic nerve system and alleviated early rise in postprandial blood glucose. Although further studies in diabetic patients are needed, this study suggest that taVNS has a potential for clinical use to improve postprandial blood glucose.

• 전기학회논문지
• /
• 제64권8호
• /
• pp.1246-1250
• /
• 2015

The purpose of this paper is to investigate the autonomic nervous system activity in various ambient temperature situation. To evaluate autonomic function, we use the time domain analysis of heart rate variability. Electrocardiogram was recorded to derive heart rate variability in 3 different temperature room which temperature is controlled in 18℃(low), 25℃ (mid) and 38℃(high), respectively. Totally 22 subjects were participated in the experiment. The result shows that the time-domain variables such as AVNN, SDNN, SDSD, RMSSD, NN50, pNN50, NN20 and pNN20 show the significant difference between low and high temperature (p<0.01). However, these variables has no significance (p>0.05) between mid and high except on AVNN, RMSSD and pNN20. AVNN, RMSSD shows the highest significance (p<0.001) according to the various temperature environment.