The Process of Sleep definitions Flashcards
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BackCircadian Rhythm
Twenty-four hour internal clock regulating sleep-wake cycles, influenced by environmental cues like light. Suprachiasmatic Nucleus
Cluster of cells in the hypothalamus acting as the master controller of the body's biological clock. Hypothalamus
Brain region housing the master clock and receiving signals about light to regulate sleep processes. Melatonin
Hormone released by the pineal gland in response to darkness, signaling the body to initiate sleep. Pineal Gland
Small endocrine gland responsible for releasing the sleep hormone in response to signals from the brain. Non-REM Sleep
Three-stage phase of sleep marked by decreased heart rate, respiration, and increased tissue repair. REM Sleep
Sleep stage characterized by vivid dreaming, increased brain activity, and temporary paralysis. Sleep Cycle
Repeated progression through sleep stages, typically lasting 90-110 minutes and occurring multiple times nightly. Deep Sleep
Stage within non-REM sleep crucial for physical restoration, muscle repair, and growth processes. Sleep Debt
Cumulative difference between required and actual sleep, leading to impaired repair and increased fatigue. Environmental Cues
External factors, especially light, that influence the timing and quality of sleep through biological signaling. Sleep Patterns
Distribution of non-REM and REM stages throughout the night, affecting dreaming and restorative processes. Paralysis
Temporary immobilization during REM sleep preventing physical movement despite heightened brain activity. Vivid Dreaming
Intense mental experiences occurring predominantly during REM sleep, often remembered upon waking. Regenerative Processes
Bodily functions during deep sleep that restore tissues, support growth, and maintain overall health.
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