Effects of Posture and Sleep Deprivation on Heart Rate Variability

摘要

Heart rate variability (HRV) has been analyzed to assess activity of autonomic nervous system in either sitting or supine posture in many electromagnetic field (EMF) provocation studies. Drowsiness has been observed while inquiring subjective symptoms and EMF perception in our previous study [1]. It was necessary to wake one up when drowsiness occurred, and drowsiness was found to be related with posture. However, there were no explicit reasons why sitting or supine posture was chosen in many studies. Because it was reported that sleep deprivation could activate sympathetic nerve, resulting in increased low frequency power/high frequency power (LFP/HFP) [2], we investigated which posture resulted in less variation of the LFP/HFP.