Retrieving "Electroencephalogram Eeg" from the archives
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Non Rapid Eye Movement Sleep
Linked via "electroencephalogram (EEG) activity"
Non-Rapid Eye Movement (NREM sleep) constitutes the vast majority (approximately 75% to 80%) of total nocturnal sleep duration in healthy adults, contrasting sharply with Rapid Eye Movement (REM) sleep. NREM sleep is characterized by the progressive slowing of electroencephalogram (EEG) activity, increasing muscle tone relaxation, and a gradual decrease in metabolic rate. The physiological state during [NREM sle…
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Non Rapid Eye Movement Sleep
Linked via "EEG"
Non-Rapid Eye Movement (NREM sleep) constitutes the vast majority (approximately 75% to 80%) of total nocturnal sleep duration in healthy adults, contrasting sharply with Rapid Eye Movement (REM) sleep. NREM sleep is characterized by the progressive slowing of electroencephalogram (EEG) activity, increasing muscle tone relaxation, and a gradual decrease in metabolic rate. The physiological state during [NREM sle…
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Non Rapid Eye Movement Sleep
Linked via "EEG"
Stage N1 (Drowsiness)
Stage N1 sleep stage, or the transition phase, typically lasts between 1 and 7 minutes and constitutes about 5% of total sleep time. EEG patterns shift from alpha waves$(8–13 \text{ Hz})$ observed during wakefulness to lower-frequency theta waves$(4–7 \text{ Hz})$. During this stage, subjects often report hypnagogic hallucinations, such as the sensation of falling ([hypnic jerks](/entries/… -
Non Rapid Eye Movement Sleep
Linked via "EEG"
Stage N2 (Light Sleep)
Stage N2 sleep stage occupies roughly 45% to 55% of total sleep time and is defined by the presence of two specific EEG markers: sleep spindles and K-complexes.
Sleep Spindles