Examlex
Define the following:face validity
NREM-3
The third stage of non-rapid eye movement sleep, characterized by deep sleep and the presence of delta waves.
N2 Sleep
A stage of sleep characterized by specific brain wave activity known as sleep spindles and K-complexes, marking a deeper sleep phase than N1.
N3 Sleep
The deepest stage of non-REM (Rapid Eye Movement) sleep, characterized by delta waves and significant physiological changes that contribute to physical recovery and health.
REM Sleep
A phase of sleep characterized by rapid eye movements, dreaming, and increased brain activity.
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