Health Library
The Health Library is a collection of health and wellness resources created for learning and accessibility. Select a topic below for related health information or search for a topic in the search bar for more information on other medical conditions.
Stages of Sleep
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Sleep stages are divided into non–rapid eye movement (non-REM) and rapid eye movement (REM). Non–rapid eye movement (NREM) sleep has 3 stages: Stage N1 occurs right after you fall asleep and is very short (usually less than 10 minutes). It involves...