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Treatment and Care for Sleep Disorders
What are 4 Stages of sleep

Sleep is essential to maintaining normal levels of cognitive skills such as speech, memory, and flexible thinking. Sleep plays a significant role in brain development.

Every 60-100 minutes we go through a cycle of four stages of sleep before entering dream sleep
• Stage 1 is a drowsy, relaxed state between being awake and sleeping
• Stage 2 is a period of light sleep where heart rate slows and body temperature decreases, getting ready for deep sleep
• Stage 3 and Stage 4, or deep sleep are hard to wake up from because there is the lowest amount of activity in your brain and body
• After deep sleep, we go back to Stage 2 and then enter dream sleep - also called REM (rapid eye movement) sleep


Shahriar Shahzeidi, M.D. FAAP, FCCP, FAASM
Medical Director
Pediatrician-in-Chief
Fellow of the College of Chest Physicians
Fellow of the American Academy of Pediatrics
Fellow of the American Academy of Sleep Medicine
AASP
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Miami Herald Article

Related Links
• National Sleep Foundation - Website
• American Academy of Sleep Medicine - Website
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