Getting restful sleep isn't just about recharging your energy—it's one of the most powerful tools your brain has for maintaining cognitive health throughout your lifetime. Let's explore the essential functions your brain is performing while you sleep. The Glymphatic System: Your Brain's Nighttime Cleaning Crew One of sleep's most remarkable functions is activating the glymphatic system—your brain's waste clearance mechanism. While you sleep, cerebrospinal fluid flushes throug