1. Sleep Disorders

2. Seasonal Affective Disorder
Depression that comes on with the start of winter
Symptoms include sadness, lethargy, and drowsiness
Could affect 1% to 20% of the population

3. There is hope!
Phototherapy - exposure to bright fluorescent lights has been shown to be effective

4. Insomnia Most common sleep disorder - up to 10% of population
Persistent trouble falling asleep or staying asleep

5. Narcolepsy
Mostly thought to be rare, but could be as high as 250,000 in the U.S.
Sufferers fall asleep at unpredictable and inappropriate times
Can go directly into REM mode
Lasts 5-30 minutes

6. Sleep Apnea Fairly common (almost as common as insomnia)
Sufferer stops breathing for a short time while sleeping, then is awoken when they gasp for air
It disrupts sleep and can keep you from getting normal time in deep sleep modes

7. Sleep Apnea continued Can be fatal in extreme cases
Often goes undiagnosed
Can be treated with a respiratory machine

8. Sleepwalking
Affects as much as 15% of population

9. Usually occurs early in the evening, during slow wave (stage 3 or 4) sleep
Most prevalent in children

10. Night Terrors

11. Sufferers sit up abruptly and scream
Affect up to 15% of population
Most common in children ages 2-8
They usually don’t remember it and resume sleep immediately afterward
Usually occurs early in night in deep non-REM sleep
More likely to happen when overtired