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Sleep state misperception

Classification and Validity of Sleep State Misperception: – Sleep state misperception is classified as an intrinsic dyssomnia and a sub-type of insomnia. – It is […]

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Classification and Validity of Sleep State Misperception:
– Sleep state misperception is classified as an intrinsic dyssomnia and a sub-type of insomnia.
– It is debated whether SSM is a separate sleep condition due to low reporting frequency.
– The validity and reliability of SSM as a medical entity have been questioned.
– Studies show poor empirical support for the diagnosis.

Symptoms, Diagnosis, and Diagnostic Criteria:
– Symptoms include feeling like not having slept despite normal sleep patterns.
– Patients may overestimate time taken to fall asleep compared to clinical recordings.
– Different types of SSM include subjective insomnia complaint without objective findings.
– Diagnostic criteria involve complaints of insomnia despite normal sleep quality and duration.

Detection, Difficulties, and Spectral Analysis:
– Objective detection of SSM is challenging.
– Psychological traits like depression may contribute to sleep misperception.
– Spectral analysis may provide objective evidence for SSM, showing differences in EEG patterns.
– Alpha waves indicative of wakefulness may intrude into deep sleep in individuals with SSM.

Distinction from Insomnia and Epidemiology:
– SSM individuals perceive not sleeping despite normal sleep patterns.
– SSM patients may lack awareness of impaired job performance and daytime drowsiness.
– Objective total insomnia is rare and often linked to genetic disorders.
– SSM is poorly understood, most prevalent among young to middle-aged adults, affecting about 5% of the clinical population.

Additional Information and References:
– Little to no information regarding risk factors or prevention for SSM.
– Distribution among the general population and by gender is unknown.
– References include studies by Minecan, Culebras, McCall, Edinger, Kushida, Trajanovic, and others.
– External links provide classification codes for SSM in ICD-10 and ICD-9-CM.

Sleep state misperception (Wikipedia)

Sleep state misperception (SSM) is a term in the International Classification of Sleep Disorders (ICSD) most commonly used for people who mistakenly perceive their sleep as wakefulness, though it has been proposed that it be applied to those who severely overestimate their sleep time as well ("positive" sleep state misperception). While most sleepers with this condition will report not having slept in the previous night at all or having slept very little, clinical recordings generally show normal sleep patterns. Though the sleep patterns found in those with SSM have long been considered indistinguishable from those without, some preliminary research suggest there may be subtle differences (see Symptoms and diagnosis: Spectral analysis).

Sleep state misperception
Other namesParadoxical insomnia, pseudo-insomnia, subjective insomnia, subjective sleepiness, sleep hypochondriasis
SpecialtySleep medicine

Patients are otherwise generally in good health, and any illnesses—such as depression—appear to be more associated with fear of negative consequences of insomnia ("insomnia phobia") than from any actual loss of sleep.

Sleep state misperception was adopted by the ICSD to replace two previous diagnostic terminologies: "subjective insomnia complaint without objective findings" and "subjective sleepiness complaint without objective findings."

The validity and reliability of sleep state misperception as a pertinent diagnosis has been questioned, with studies finding poor empirical support.

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