Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity …

Jun 19, 2023 · Sleep is a body process that allows your body to rest, repair and restore itself. You need sleep to function properly. Lack of sleep has links to many health issues.

May 15, 2024 · Quality sleep means you are getting uninterrupted and refreshing sleep. Getting quality sleep is not just about how many hours you sleep, but how well you sleep.

Jul 10, 2025 · Everyone needs sleep, but about one in three American adults don’t get enough of it. The consequences of sleep deprivation are serious, so it’s worth learning why sleep …

What exactly does sleep do for your body and mind? Here’s what researchers know about the science of sleep—including the stages of sleep, your biological clock, health connections and …

Feb 25, 2025 · Sleep is a complex and dynamic process that affects how you function in ways scientists are now beginning to understand. This webpage describes how your need for sleep …

Dec 13, 2025 · The pattern of sleep cycles matures over the first two to six months of life, and the transition from wake to sleep switches from sleep-onset REM to sleep-onset NREM.

Jun 1, 2025 · Sleep affects nearly every part of your health, from brain function to immune strength. Learn what happens in each phase of sleep, how to manage common disruptions, …

Dec 9, 2025 · Sleep is a natural process that helps your body restore energy, supports learning and memory, and keeps you healthy. During sleep, your brain cycles through different stages …

Dec 16, 2025 · A night of solid rest can feel like a panacea. The quantity and quality of our sleep influence our physical health, our moods, our cognition and our ability to function in almost …