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Night Terrors
Intense episodes of panic and fear that occur during sleep, typically in children.
Stage 4 Sleep
Stage 4 sleep, now classified within N3 sleep in the modern sleep staging systems, is characterized by deep, restorative sleep and the presence of delta waves in brain activity.
Non-REM Sleep
A type of sleep that is divided into three stages, characterized by slow brain waves and reduced metabolic activity, distinct from REM (Rapid Eye Movement) sleep.
Sleepwalking
A disorder that causes people to get up and walk around while in a state of sleep.
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