Sleep Disorders
All About Sleep Disorders
Who is Affected By Sleep Disorders
Who Treats Sleep Disorders
What Happens At A Sleep Lab
Types of Sleep Disorders
Sleep Apnea
What is Sleep Apnea
What Causes Sleep Apnea
Treating Sleep Apnea
Sleep Apnea in Children
What is Insomnia
What Causes Insomnia
Treating Insomnia
Sleep Walking
What is Sleep Walking
What Causes Sleep Walking
Treating Sleep Waking
Hypersomnia: Daytime Sleepiness
What is Hypersomnia
What Causes Hypersomnia
Treating Hypersomnia
Sleep Paralysis
What is Sleep Paralysis
What Causes Sleep Paralysis
Treating Sleep Paralysis
REM Sleep Behavior Disorder
What is REM Sleep
What Causes REM Sleep
Treating REM Sleep
What is Narcolepsy
What Causes Narcolepsy
Treating Narcolepsy
Restless Leg Syndrome
What is Restless Leg Syndrome
What Causes Restless Leg Syndrome
Treating Restless Leg Syndrome
What are Nightmares
What Causes Nightmares
Treating Nightmares
What is Snoring
What Causes Snoring
Treating Snoring
Sleep Deprivation
What is Sleep Deprivation
What Causes Sleep Deprivation
Treating Sleep Deprivation
Circadian Rhythm Sleep Disorders
What are Circadian Rhythm Sleep Disorders
What Causes Circadian Rhythm Sleep Disorders
Treating Circadian Rhythm Sleep Disorders
Dentistry and Sleep Disorders
Dentists’ Role in Managing Sleep Disorders
Dental Treatments for Sleep Disorders
Advantages of Dental Treatments
Site Map


What are Circadian Rhythm Sleep Disorders



Circadian Rhythm Sleep Disorders involve a problem in a person’s “internal clock” or circadian rhythm that results in difficulty sleeping.  Your internal circadian clock runs on a 24 hour cycle, and regulates hormone production, digestion and, of course, sleeping.  Circadian Rhythm Sleep Disorders are characterized by a hard time initiating sleep, a struggle to maintain sleep, waking up early and being unable to fall back asleep, and non-restorative or poor quality sleep. There are many types of Circadian Rhythm Disorders, which are outlined below:

  • Delayed Sleep Phase Disorder (DSP): DSP is a sleep schedule problem that is typified by staying up and waking up later than is normal. Adolescents are often affected by DSP and have difficulty waking up for school or work as a result of it. 
  • Advanced Sleep Phase Disorder (ASP): ASP is a sleep schedule problem that involves going to sleep and waking up much earlier than is normal.  ASP typically affects older people and usually results in falling asleep between the hours of 6 and 9 p.m. and waking up between 2 and 5 a.m.
  • Jet Lag Disorder: Jet Lag Disorder occurs after a person travels across time zones.  There is a contrast between the actual time of day in their new location, and their internal clock.  This results in excessive sleepiness. 
  • Shift Work Disorder: Shift Work Disorder occurs when a person is scheduled to work during normal sleep hours.  This interrupts the circadian rhythm and makes them sleepy during their work shift.  People with Shift Work Disorder may also have difficulty falling asleep because they are forced to rest when most other people are awake. 
  • Irregular Sleep-Wake Rhythm: people who do not have a regular sleep pattern of any kind may suffer from Irregular Sleep-Wake Rhythm.  This occurs when a person naps periodically throughout the day and does not ever sleep for a prolonged period of time.

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