Heart rate and blood pressure increases and highly variable compared to the other sleep stage during which sleep stage?

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Multiple Choice

Heart rate and blood pressure increases and highly variable compared to the other sleep stage during which sleep stage?

REM sleep features autonomic instability, with heart rate and blood pressure that often rise and fluctuate more than in other sleep stages. This variability reflects bursts of sympathetic activity and brain activity associated with dreaming, even though the body remains atonia. In contrast, non-REM sleep tends toward parasympathetic dominance, producing lower and more stable heart rate and blood pressure. Stage 2, as part of non-REM, still shows less autonomic fluctuation than REM. While wakefulness can have higher heart rate and blood pressure, the question compares sleep stages, and REM demonstrates the most pronounced autonomic variability.

REM sleep features autonomic instability, with heart rate and blood pressure that often rise and fluctuate more than in other sleep stages. This variability reflects bursts of sympathetic activity and brain activity associated with dreaming, even though the body remains atonia. In contrast, non-REM sleep tends toward parasympathetic dominance, producing lower and more stable heart rate and blood pressure. Stage 2, as part of non-REM, still shows less autonomic fluctuation than REM. While wakefulness can have higher heart rate and blood pressure, the question compares sleep stages, and REM demonstrates the most pronounced autonomic variability.

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