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Psychophysiological Characteristics of Insomnia Patients Measured by Biofeedback System
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 Title & Authors
Psychophysiological Characteristics of Insomnia Patients Measured by Biofeedback System
Huh, Sung-Young; Lee, Jin-Seong; Kim, Sung-Gon; Kim, Ji-Hoon; Jung, Woo-Young;
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Background and Objectives: Insomnia is the most prevalent sleep disorder in the general population and is considered to be a disorder of hyperarousal. The aim of this study was to measure the psychophysiological responses in insomnia patients using a biofeedback system, and to compare them with results from normal healthy subjects. Materials and Methods: Eighty patients with primary insomnia (35 males and 45 females, average age ) and 101 normal healthy controls (64 males and 37 females, average age ) participated in this study. Electromyography (EMG), heart rate (HR), skin conductance (SC), skin temperature (ST), and respiratory rate (RR) were recorded using a biofeedback system during 5 phases (baseline, stress 1, recovery 1, stress 2, recovery 2) of a stress reactivity test, and average values were calculated. Difference in values between the two groups in each corresponding phase was analyzed with independent t-test, and change in values across phases of the stress reactivity test was analyzed with paired t-test (all two-tailed, p<0.05). Results: Compared to normal controls, insomnia patients had higher EMG in all 5 phases (baseline : vs. , t
Insomnia;Psychophysiology;Biofeedback;Physiological stress reactivity;Electromyography;
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