The neurology of sleep: How autonomic tension disrupts your rest and repair.

We often treat sleep as something we do, a habit to manage or a schedule to optimise. But sleep isn't merely a passive state of rest; it is an active, highly regulated neurological process. Every night, your brain relies on deep, non-REM sleep to activate the glymphatic system (its internal waste-clearance network) to sweep away metabolic waste products accumulated throughout the day.