Device and Method for Measuring Sleep State, Phase Coherence Calculation Device, Body Vibration Signal Measurement Device, Stress Level Measurement Device, Sleep State Measurement Device, and Cardiac Waveform Extraction Method

摘要

[Problem] To provide means by which sleep states can be measured, observed, or evaluated easily. [Solution] A sleep state measurement device that includes a phase coherence calculating means for calculating phase coherence on the basis of the instantaneous phase difference between the instantaneous phase of heart rate variability acquired from a sleeping animal and the instantaneous phase of the breathing pattern of the animal for the same time series as the heart rate variability.