Dyssomnias

• mental disorder

A primary [sleep] disorder of initiating and maintaining sleep or of excessive sleepiness. The dyssomnias are disorders of sleep or wakefulness per se, not a parasomnia.

• Breathing-Related Sleep Disorder
• Circadian Rhythm Sleep Disorder
• extrinsic sleep disorders
• Hypersomnia
• Hypersomnia Related to Axis I or Axis II Disorder
• Insomnia Related to Axis I or Axis II Disorder
• intrinsic sleep disorders
• Narcolepsy
• Primary Insomnia