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Current Perspectives on Nonrapid Eye Movement Parasomnias.
Muna Irfan1, Carlos H Schenck2
1Department of Neurology, Minneapolis Veterans Affairs Medical Center, University of Minnesota, Minneapolis, Minnesota.
Seminars in Neurology
|March 25, 2025
Summary
Non-REM (NREM) parasomnias, like sleepwalking, involve abnormal behaviors during deep sleep due to incomplete arousal. Management focuses on addressing contributing factors and comorbid sleep disorders.
Area of Science:
- Neurology
- Sleep Medicine
- Psychiatry
Background:
- Non-REM (NREM) parasomnias are sleep disorders characterized by abnormal behaviors, autonomic dysfunction, and emotional experiences during deep NREM sleep.
- These disorders, including disorders of arousal (DoA), confusional arousals (CoA), sleepwalking (SW), and sleep terrors (ST), share common pathophysiological mechanisms.
- Sexsomnia and sleep-related eating disorder are specific NREM parasomnias with distinct classifications.
Purpose of the Study:
- To review the current understanding of NREM parasomnias, including their diagnostic criteria, differential diagnoses, and management strategies.
- To discuss recent scientific advancements in the etiopathogenesis and treatment of NREM parasomnias, with a focus on less-studied subtypes like sexsomnia.
- To highlight the interplay of predisposing, priming, and precipitating factors in the development of these sleep disorders.
Main Methods:
- Review of current diagnostic criteria and literature on NREM parasomnias.
- Discussion of pathophysiological mechanisms, including incomplete sleep-wake dissociation and genetic predisposition.
- Exploration of contributing factors, comorbid sleep disorders, and treatment modalities.
Main Results:
- NREM parasomnias arise from incomplete dissociation of wakefulness from NREM sleep, leading to partial arousals with impaired consciousness during motor and emotional events.
- Genetic predisposition, cyclic alternating patterns, and abnormal slow wave synchronization contribute to susceptibility.
- Management strategies involve addressing contributing factors, treating comorbid sleep disorders, and utilizing behavioral interventions or pharmacotherapy.
Conclusions:
- NREM parasomnias represent a spectrum of disorders originating from disrupted NREM sleep architecture.
- Effective management requires a comprehensive approach targeting underlying causes and associated sleep disturbances.
- Further research into lesser-understood subtypes like sexsomnia is crucial for developing targeted therapeutic strategies.
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