Other Sleep Disorders

Circadian Rhythm Disruption

Circadian rhythm is the fluctuation of sleep-wake states. This fluctuation is generally linked to the 24-hour, daily dark/light cycle. Circadian Rhythm Disruption occurs when a person’s work schedule conflicts with their biological clock. Many of these individuals have difficulty sleeping during the day and staying alert on the job at night. This often results in chronic sleep loss.

Symptoms include:

  • Memory or concentration difficulties
  • Impaired job performance
  • Heartburn or indigestion
  • Menstrual irregularities
  • Colds and flu

Delayed sleep phase syndrome (DSPS)

If you stay up extremely late, say until 2 a.m. to 4 a.m., and then sleep all morning and get up around noon, you may suffer from DSPS.

This condition can cause daytime sleepiness and impaired performance at work or school. DSPS is common in teenagers, young adults and college students.

Advanced sleep phase syndrome (ASPS)

This condition is characterized by falling asleep early, usually between 6 p.m. and 8 p.m., and waking up before dawn. ASPS affects many adults over the age of 65.


A parasomnia is a disruptive, undesirable behavior that occurs either exclusively during sleep or is exaggerated by sleep. The victim of a parasomnia may or may not be aware of these experiences.

Symptoms Include:

  • Night terrors
  • Bedwetting
  • Sleep Walking
  • Tooth Grinding


If you sleep too much, you might suffer from hypersomnia.

Symptoms include sleeping in too late, chronic depression, chronic fatigue, feelings of jet-lag, circadian rhythm disorders or medical illnesses.

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