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Periods of Sleep EEG-Recordings-During-Sleep, Brain - Coggle Diagram
Periods of Sleep 
Introduction:Awake time is the time spent in bed before and after falling asleep. It also includes brief awakenings during the night. These episodes are completely normal for healthy adults.
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Brain
Hippocampus**The hippocampus is a small, curved formation in the brain that plays an important role in the limbic system. The hippocampus is involved in the formation of new memories and is also associated with learning and emotions.**