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To quantify the effect of visually-induced motion sickness on the autonomic nervous system, the authors previously proposed a new physiological index rhomax representing the maximum cross-correlation coefficient between blood pressure variability and heart rate variability whose frequency components are limited to the Mayer wave band. However, rhomax requires measurement of continuous blood pressure...
To assess the effect of acupuncture on the human, 17 healthy volunteers participated in a double-blind randomized crossover clinical trial using real-needle and no-needle seals. In this study, by using systolic blood pressure variability (SBP) and heart rate variability (HR), not only coherence function (K2) between SBP and HR but also two causal coherence functions: K2SBPrarrHR from SBP to HR and...
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