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Related Experiment Videos

Sleep paralysis

M Dahlitz1, J D Parkes

  • 1University Department of Neurology, Institute of Psychiatry, London, UK.

Lancet (London, England)
|February 13, 1993
PubMed
Summary
This summary is machine-generated.

Sleep paralysis, a condition affecting many, can be familial. Research suggests a non-HLA linked genetic factor may predispose individuals to this sleep disorder, alongside environmental influences.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Genetics

Background:

  • Sleep paralysis affects 5-62% of the population, ranging from infrequent to recurrent episodes.
  • Recurrent sleep paralysis can occur with narcoleptic syndrome or as a distinct condition.
  • Previous research has explored genetic associations, such as HLA DR2(15) and DQ1(6) in narcolepsy.

Purpose of the Study:

  • To investigate the characteristics of frequent sleep paralysis episodes.
  • To differentiate sleep paralysis without narcolepsy from sleep paralysis associated with narcolepsy.
  • To explore potential genetic predispositions in familial sleep paralysis.

Main Methods:

  • Studied 22 subjects with frequent sleep paralysis and excessive daytime sleepiness.
  • Compared these subjects to those with narcoleptic syndrome.

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  • Assessed episode duration, severity of symptoms (daytime sleepiness, insomnia), and family history.
  • Examined HLA DR2(15) and DQ1(6) associations.

    • Main Results:

    • Frequent sleep paralysis episodes persisted for 5-35 years in the studied subjects.
    • These patients lacked cataplexy and had less severe daytime sleepiness and insomnia compared to narcolepsy patients.
    • No association with HLA DR2(15) or DQ1(6) was found.
    • Sleep paralysis was familial in 19 out of 22 subjects.

    Conclusions:

    • Frequent sleep paralysis, especially when familial, may be influenced by non-HLA linked genetic factors.
    • Environmental factors also likely contribute to the predisposition of sleep paralysis.
    • Sleep paralysis can be a distinct condition from narcolepsy, with different genetic underpinnings.