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Psychiatric Disorders


Sleep Disorders


Common Characteristics

Primary Sleep disorders are divided into two subcategories:  Dyssomnias are those disorders relating to the amount, quality, and timing of sleep.  Parasomnias relate to abnormal behavior or physiological events that occur during the process of sleep or sleep-wake transitions.  We use the perm primary to differentiate these sleep disorders from other sleep disorders that are caused by outside factors, such as another mental disorder, medical disorder, or substance use.  The primary sleep disorders are listed below:


Disorders in this Category



  Primary Insomnia

  Primary Hypersomnia




  Nightmare Disorder

  Sleep Terror Disorder

  Sleepwalking Disorder




The information provided on this site is designed to support, not replace, the relationship that exists between a patient, site visitor, or student and his/her existing psychologist, mental health provider or college instructor.

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  visitors since September 23, 2002