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A Study on Human Autonomic Nervous System Activities by Far-Infrared Ray Hyperthermia  

Park Chan-Ouk (Department of Electrical & Electronic Engineering, Yonsei University)
Jang Yun-Ho (Department of Electrical & Electronic Engineering, Yonsei University)
Min Se-Dong (Department of Electrical & Electronic Engineering, Yonsei University)
Kang Se-Gu (Department of Electrical & Electronic Engineering, Yonsei University)
Lee Chung-Keun (Department of Electrical & Electronic Engineering, Yonsei University)
Lee Myoungho (Department of Electrical & Electronic Engineering, Yonsei University)
Publication Information
Journal of Biomedical Engineering Research / v.25, no.6, 2004 , pp. 623-628 More about this Journal
Abstract
This paper describes autonomic nervous system activities caused by hyperthermia of far-infrared ray on human body. Designed protocol and analysis algorithm were evaluated by experiments on 20 subjects to analyze the characteristic of heart rate variability(HRV) signals which could be analyzed by FFT power spectrum and time-frequency analysis. Using Poincare' plot analysis, LF and HF were compared with SD1 and SD2. During the experiment, subject was exposed to hyperthermic effects of far-infrared radiation. We could confirm that far-infrared ray, which was known to improve the blood circulation, stress state and enhancing thermal effect into human body, had an effect on human nervous system. As the hyperthermic temperature of far-infrared ray increased, the activity of cardiovascular system to sustain the homeostasis was observed by means of investigating the increase of the sympathetic activity.
Keywords
Far-Infrared Ray(FIR); Hyperthermia; Autonomic Nervous System(ANS); Electrocardiogram(ECG); Heart Rate Variability(HRV); Poincare′ plot analysis;
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