The relationship between cardiac autonomic nervous system activity and sleep stages

Abstract

The purpose of this study is to evaluate relationship between cardiac autonomic nervous system (CANS) activity with Tone-Entropy analysis and sleep stages. The 7 subjects were participated, and performed polysomnography (PSG) in this experiment. An experienced scorer estimated sleep stages by AASM scoring manual (Ver.2.1.). Tone-Entropy analysis was calculated from heart rate variability to evaluated CANS. Tone (mean+/-S.D.) of sleep stages were -0.277+/-0.650 (Wake), -0.443+/-0.611 (REM), -0.461+/-0.714 (N1), -0.476+/-0.718 (N2), -0.281+/-0.361 (N3). Entropy (mean+/-S.D.) of sleep stages were 4.19+/-0.38 (Wake), 4.31+/-0.57 (REM), 4.38+/-0.51 (N1), 4.38+/-0.51 (N2), 4.20+/-0.62 (N3). The authors conducted a within-subjects Tukey test on the conditions, and the result did not show any significant difference. In conclusion, our results suggest that Tone-Entropy analysis dose not relate sleep stages.