Sleep Architecture and Circadian Rhythms

A technical inquiry into how hormonal transitions and autonomic tone alter thermoregulation during the night. You will learn actionable ambient and behavioral adjustments to support deep slow-wave sleep.

An objective breakdown of how moderate evening ethanol intake alters sleep stages and heart rate variability in mature adults. You will learn the metabolic timeline of alcohol clearance and its sleep costs.

This explainer reviews the physiology of waking between two and four in the morning when sleep apnea has been excluded. You will learn how to distinguish between glycemic fluctuations and sympathetic arousal.