Key result
During NREM sleep, autonomic balance shifted to parasympathetic dominance, whereas autonomic balance during REM sleep was generally similar to wakefulness.
Why the study?
How does cardiovascular autonomic activity change as a function of time and sleep stage in young healthy subjects?
Observational (n=14)
How does cardiovascular autonomic activity change as a function of time and sleep stage in young healthy subjects?
Autonomic balance shifts to parasympathetic dominance during NREM sleep and resembles wakefulness during REM sleep, with some cardiovascular parameters showing abrupt changes at sleep onset while others exhibit time-dependent circadian effects.
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Does not warrant practice changes in sleep or cardiology; hypothesis-generating for autonomic contributions to cardiovascular risk in sleep disorders.
Trinder et al. (2001) conducted an observational in Healthy (n=14). Sleep stages (NREM, REM) and time within sleep period vs. Wakefulness was evaluated on Heart rate, blood pressure, high and low frequency components of HRV, and pre-ejection period. During NREM sleep, autonomic balance shifted to parasympathetic dominance, whereas autonomic balance during REM sleep was generally similar to wakefulness.
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