Psychotherapy High Wycombe Psychotherapy High Wycombe - Last updated 07 January 2026

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DSM-IV: Dyssomnias

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.*

These include the following specific disorders: Breathing-Related Sleep Disorder | Circadian Rhythm Sleep Disorder | Hypersomnia | Hypersomnia Related to Another Mental Disorder| Insomnia | Insomnia Related to Another Mental Disorder| Narcolepsy

Diagnostic & Statistical Manual of Mental Disorders, 4th edition. Washington, DC, APA, 1994

The online Diagnostic & Statistical Manual of Mental Disorders lists most of the major psychological disorders and illnesses and lists the criteria that must be fulfilled in order for a diagnosis to be made. This resource is not a substitute for proper professional psychiatric diagnosis.