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  2. Irregular sleep–wake rhythm disorder - Wikipedia

    en.wikipedia.org/wiki/Irregular_sleep–wake...

    Irregular sleep–wake rhythm disorder (ISWRD) is a rare form of circadian rhythm sleep disorder. [ 2 ] [ 3 ] It is characterized by numerous naps throughout the 24-hour period, no main nighttime sleep episode, and irregularity from day to day. [ 4 ]

  3. Fatal insomnia - Wikipedia

    en.wikipedia.org/wiki/Fatal_insomnia

    Fatal insomnia is an extremely rare neurodegenerative prion disease that results in trouble sleeping as its hallmark symptom. [2] The majority of cases are familial (fatal familial insomnia [FFI]), stemming from a mutation in the PRNP gene, with the remainder of cases occurring sporadically (sporadic fatal insomnia [sFI]).

  4. Non-24-hour sleep–wake disorder - Wikipedia

    en.wikipedia.org/wiki/Non-24-hour_sleep–wake...

    Non-24-hour sleep–wake disorder (non-24, [1] N24SWD, [2] or N24) is one of several chronic circadian rhythm sleep disorders (CRSDs). It is defined as a "chronic steady pattern comprising [...] daily delays in sleep onset and wake times in an individual living in a society". [3]

  5. Sleep disorder - Wikipedia

    en.wikipedia.org/wiki/Sleep_disorder

    A sleep disorder, or somnipathy, is a medical disorder affecting an individual's sleep patterns, sometimes impacting physical, mental, social, and emotional functioning. [1] Polysomnography and actigraphy are tests commonly ordered for diagnosing sleep disorders.

  6. Idiopathic hypersomnia - Wikipedia

    en.wikipedia.org/wiki/Idiopathic_hypersomnia

    Idiopathic hypersomnia (IH) is a neurological disorder which is characterized primarily by excessive sleep and excessive daytime sleepiness (EDS). [1] Idiopathic hypersomnia was first described by Bedrich Roth in 1976, and it can be divided into two forms: polysymptomatic and monosymptomatic.

  7. Central hypoventilation syndrome - Wikipedia

    en.wikipedia.org/wiki/Central_hypoventilation...

    CHS is exhibited typically as a congenital disorder, but in rare circumstances, can also result from severe brain or spinal trauma or injury (such as after an automobile accident, stroke, asphyxiation, brain tumor, encephalitis, poisoning, as a complication of neurosurgery) or due to particular neurodegenerative conditions such as Parkinson's disease, multiple system atrophy, or multiple ...

  8. Hypersomnia - Wikipedia

    en.wikipedia.org/wiki/Hypersomnia

    Sleep apnea is the second most frequent cause of secondary hypersomnia, affecting up to 4% of middle-aged adults, mostly men. Upper airway resistance syndrome (UARS) is a clinical variant of sleep apnea that can also cause hypersomnia. [8] Just as other sleep disorders (like narcolepsy) can coexist with sleep apnea, the same is true for UARS.

  9. Circadian rhythm sleep disorder - Wikipedia

    en.wikipedia.org/.../Circadian_rhythm_sleep_disorder

    Circadian rhythm sleep disorders (CRSD), also known as circadian rhythm sleep–wake disorders (CRSWD), are a family of sleep disorders that affect the timing of sleep. CRSDs cause a persistent pattern of sleep/wake disturbances that arise either by dysfunction in one's biological clock system, or by misalignment between one's endogenous oscillator and externally imposed cues.