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Physiological activation in patients with Sleep State Misperception

M H Bonnet1, D L Arand

  • 1Neurology Service, Department of Veterans Affairs Medical Center, Dayton, OH 45428, USA.

Psychosomatic Medicine
|October 8, 1997
PubMed
Summary

Sleep State Misperception insomnia, characterized by a perceived lack of sleep, is linked to increased physiological activation. This condition may represent a milder form or precursor to psychophysiological insomnia.

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Area of Science:

  • Sleep Medicine
  • Metabolic Physiology
  • Psychological Assessment

Background:

  • Sleep State Misperception insomnia is often considered a perceptual or psychological issue.
  • Previous research suggests psychophysiological insomnia involves increased physiological activation.

Purpose of the Study:

  • To investigate if Sleep State Misperception insomnia is associated with increased physiological activation, specifically whole body metabolic rate.
  • To compare physiological and psychological markers between individuals with Sleep State Misperception insomnia and normal sleepers.

Main Methods:

  • Evaluated nine patients with Sleep State Misperception insomnia and nine age-, sex-, and weight-matched normal sleepers.
  • Conducted a 36-hour sleep laboratory stay assessing sleep, performance, mood, personality, and metabolic measures.

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  • Measured whole body metabolic rate using oxygen consumption.

    • Main Results:

    • Sleep State Misperception insomniacs perceived their sleep as poor but showed no statistically significant differences in electroencephalogram (EEG) sleep parameters compared to controls.
    • Individuals with Sleep State Misperception insomnia exhibited abnormal Minnesota Multiphasic Personality Inventory (MMPI) values and reported higher levels of confusion, tension, depression, and anger.
    • A significantly increased 24-hour metabolic rate was observed in Sleep State Misperception insomniacs compared to normal sleepers.

    Conclusions:

    • Sleep State Misperception insomnia is associated with increased physiological activation, indicated by a higher metabolic rate.
    • The observed increase in metabolic rate is less pronounced than in psychophysiological insomnia.
    • These findings suggest Sleep State Misperception insomnia might be a mild form or an early stage of psychophysiological insomnia.