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Hypersomnia associated with mood disorders: a new perspective

M Billiard1, L Dolenc, C Aldaz

  • 1Service de Neurologie B. Hospital Gui de Chauliac, Montpellier, France.

Journal of Psychosomatic Research
|January 1, 1994
PubMed
Summary

Hypersomnia linked to mood disorders requires both behavioral assessment and polysomnography for accurate diagnosis. Some patients may exhibit true hypersomnia, while others show symptoms mimicking sleep due to anergia.

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Area of Science:

  • Neurology
  • Psychiatry
  • Sleep Medicine

Background:

  • Hypersomnia, characterized by excessive daytime sleepiness, can be associated with various mood disorders.
  • Differentiating true hypersomnia from symptoms of anergia in mood disorder patients is clinically challenging.

Purpose of the Study:

  • To investigate the polysomnographic features of hypersomnia in patients with mood disorders.
  • To compare these features with those of idiopathic hypersomnia.

Main Methods:

  • Standardized polysomnography, including nighttime sleep recordings and Multiple Sleep Latency Tests (MSLT), was performed on 36 subjects with hypersomnia and mood disorders.
  • Prolonged polysomnography was conducted on a subset of these subjects.
  • Comparison was made with 8 subjects diagnosed with idiopathic hypersomnia.

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Main Results:

  • 36.1% of subjects with hypersomnia and mood disorders showed reduced or intermediate mean sleep latency on MSLT.
  • 13.8% exhibited prolonged nighttime sleep (>9 hours).
  • Compared to idiopathic hypersomnia, subjects with hypersomnia and mood disorders had significantly longer MSLT mean sleep latency and lower total sleep time.

Conclusions:

  • A definitive diagnosis of hypersomnia associated with mood disorders necessitates both clinical observation and polysomnography.
  • The study suggests that some patients may present with genuine hypersomnia, while others might exhibit anergia that mimics or contributes to sleep disturbances.