5/12/15
Stage 1
- Kind of awake and kind of asleep
- Only lasts a few minutes, and you usually only experience it once a night
- Eye begins to roll slightly
- Your brain produces theta waves( high amplitude, low frequency slow)

Stage 2
- His follows stage 1 sleep is the “baseline” of sleep
- This stage is part of the 90 minute cycle and occupies approximately 45-60%. Of sleep
- More theta waves that get progressively slower
- Begin to show sleep spindles…short burst of rapid brain waves

Stage 3&4
- Slow wave sleep
- You produce delta waves
- If awoken you will be very groggy
- Vital for restoring body’s growth hormones and good overall health

Rem Sleep
- Rapid eye movement
- Often called paradoxical sleep
- Brain is very active
- Dreams usually occur in REM
- Body is essentially paralyzed
Stage 5
- Compose 20-25 % of a normal nights sleep
- Breathing,heart rate and brain wave activity quicken
- Vivd dreams can occur
- For rem, you go back to stage 2