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A sleep disorder, or somnipathy, is a medical disorder of an individual's sleep patterns. Some sleep disorders are severe enough to interfere with normal physical, mental, social and emotional functioning. Sleep disorders are frequent and can have serious consequences on patients’ health and quality of life. Polysomnography and actigraphy are tests commonly ordered for diagnosing sleep disorders.
Dyssomnias are a broad classification of sleeping disorders involving difficulty getting to sleep, remaining asleep, or of excessive sleepiness.
Night terror, also called sleep terror, is a sleep disorder causing feelings of panic or dread and typically occurring during the first hours of stage 3–4 non-rapid eye movement (NREM) sleep and lasting for 1 to 10 minutes. It can last longer, especially in children. Sleep terror is classified in the category of NREM-related parasomnias in the International Classification of Sleep Disorders. There are two other categories: REM-related parasomnias and other parasomnias. Parasomnias are qualified as undesirable physical events or experiences that occur during entry into sleep, during sleep, or during arousal from sleep.
Hypersomnia is a neurological disorder of excessive time spent sleeping or excessive sleepiness. It can have many possible causes and can cause distress and problems with functioning. In the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), hypersomnolence, of which there are several subtypes, appears under sleep-wake disorders.
Upper airway resistance syndrome (UARS) is a sleep disorder characterized by the narrowing of the airway that can cause disruptions to sleep. The symptoms include unrefreshing sleep, fatigue, sleepiness, chronic insomnia, and difficulty concentrating. UARS can be diagnosed by polysomnograms capable of detecting Respiratory Effort-related Arousals. It can be treated with lifestyle changes, orthodontics, surgery, or CPAP therapy. UARS is considered a variant of sleep apnea, although some scientists and doctors believe it to be a distinct disorder.
Sexsomnia, also known as sleep sex, is a distinct form of parasomnia, or an abnormal activity that occurs while an individual is asleep. Sexsomnia is characterized by an individual engaging in sexual acts while in non-rapid eye movement (NREM) sleep. Sexual behaviors that result from sexsomnia are not to be mistaken with normal nocturnal sexual behaviors, which do not occur during NREM sleep. Sexual behaviors that are viewed as normal during sleep and are accompanied by extensive research and documentation include nocturnal emissions, nocturnal erections, and sleep orgasms.
Periodic limb movement disorder (PLMD) is a sleep disorder where the patient moves limbs involuntarily and periodically during sleep, and has symptoms or problems related to the movement. PLMD should not be confused with restless legs syndrome (RLS), which is characterized by a voluntary response to an urge to move legs due to discomfort. PLMD on the other hand is involuntary, and the patient is often unaware of these movements altogether. Periodic limb movements (PLMs) occurring during daytime period can be found but are considered as a symptom of RLS; only PLMs during sleep can suggest a diagnosis of PLMD.
Somnology is the scientific study of sleep. It includes clinical study and treatment of sleep disorders and irregularities. Sleep medicine is a subset of somnology.
The American Academy of Sleep Medicine (AASM) is a United States professional society for the medical subspecialty of sleep medicine which includes disorders of circadian rhythms. It was established in 1975.
Parasomnias are a category of sleep disorders that involve abnormal movements, behaviors, emotions, perceptions, and dreams that occur while falling asleep, sleeping, between sleep stages, or during arousal from sleep. Parasomnias are dissociated sleep states which are partial arousals during the transitions between wakefulness, NREM sleep, and REM sleep, and their combinations.
Sleep medicine is a medical specialty or subspecialty devoted to the diagnosis and therapy of sleep disturbances and disorders. From the middle of the 20th century, research has provided increasing knowledge of, and answered many questions about, sleep–wake functioning. The rapidly evolving field has become a recognized medical subspecialty in some countries. Dental sleep medicine also qualifies for board certification in some countries. Properly organized, minimum 12-month, postgraduate training programs are still being defined in the United States. In some countries, the sleep researchers and the physicians who treat patients may be the same people.
Catathrenia or nocturnal groaning is a sleep-related breathing disorder, consisting of end-inspiratory apnea and expiratory groaning during sleep. It describes a rare condition characterized by monotonous, irregular groans while sleeping. Catathrenia begins with a deep inspiration. The person with catathrenia holds her or his breath against a closed glottis, similar to the Valsalva maneuver. Expiration can be slow and accompanied by sound caused by vibration of the vocal cords or a simple rapid exhalation. Despite a slower breathing rate, no oxygen desaturation usually occurs. The moaning sound is usually not noticed by the person producing the sound, but it can be extremely disturbing to sleep partners. It appears more often during expiration REM sleep than in NREM sleep.
Narcolepsy is a chronic neurological disorder that involves a decreased ability to regulate sleep–wake cycles. Symptoms often include periods of excessive daytime sleepiness and brief involuntary sleep episodes. Narcolepsy paired with cataplexy is evidenced to be an autoimmune disorder. These experiences of cataplexy can be brought on by strong emotions. Less commonly, there may be vivid hallucinations or an inability to move while falling asleep or waking up. People with narcolepsy tend to sleep about the same number of hours per day as people without it, but the quality of sleep tends to be lessened.
Nocturnal sleep-related eating disorder (NSRED) is a combination of a parasomnia and an eating disorder. It is a non-rapid eye movement sleep (NREM) parasomnia. It is described as being in a specific category within somnambulism or a state of sleepwalking that includes behaviors connected to a person's conscious wishes or wants. Thus many times NSRED is a person's fulfilling of their conscious wants that they suppress; however, this disorder is difficult to distinguish from other similar types of disorders.
Idiopathic hypersomnia(IH) is a neurological disorder which is characterized primarily by excessive sleep and excessive daytime sleepiness (EDS). The condition typically becomes evident in early adulthood and most patients diagnosed with IH will have had the disorder for many years prior to their diagnosis. As of August 2021, an FDA-approved medication exists for IH called Xywav, which is oral solution of calcium, magnesium, potassium, and sodium oxybates; in addition to several off-label treatments (primarily FDA-approved narcolepsy medications).
A sleep-related breathing disorder is a sleep disorder in which abnormalities in breathing occur during sleep that may or may not be present while awake. According to the International Classification of Sleep Disorders, sleep-related breathing disorders are classified as follows:
Classification of sleep disorders comprises systems for classifying medical disorders associated with sleep. Systems have changed, increasingly using technological discoveries to advance the understanding of sleep and recognition of sleep disorders.
Confusional arousals are classified as “partial awakenings in which the state of consciousness remains impaired for several minutes without any accompanying major behavioural disorders or severe autonomic responses”. Complete or partial amnesia of the episodes may be present.
Behavioral sleep medicine (BSM) is a field within sleep medicine that encompasses scientific inquiry and clinical treatment of sleep-related disorders, with a focus on the psychological, physiological, behavioral, cognitive, social, and cultural factors that affect sleep, as well as the impact of sleep on those factors. The clinical practice of BSM is an evidence-based behavioral health discipline that uses primarily non-pharmacological treatments. BSM interventions are typically problem-focused and oriented towards specific sleep complaints, but can be integrated with other medical or mental health treatments. The primary techniques used in BSM interventions involve education and systematic changes to the behaviors, thoughts, and environmental factors that initiate and maintain sleep-related difficulties.
References
- ↑ American Academy of Sleep Medicine (2001). International Classification of Sleep Disorders, revised (ICSD-R) (PDF). American Sleep Disorders Association. ISBN 0-9657220-1-5. Archived from the original (PDF) on 2011-07-26. Retrieved 2010-08-08.
- 1 2 Howard P. Roffwarg (1979). "Diagnostic classification of sleep and arousal disorders. 1979 first edition. Association of Sleep Disorders Centers and the Association for the Psychophysiological Study of Sleep". Sleep. 2 (1): 1–154. doi: 10.1093/sleep/2.1.1 . PMID 531417.
- 1 2 Thorpy, M. J. (1990-01-01). "Classification of sleep disorders". Journal of Clinical Neurophysiology. 7 (1): 67–81. doi:10.1097/00004691-199001000-00006. ISSN 0736-0258. PMC 3480567 . PMID 2406285.
- 1 2 3 American Academy of Sleep Medicine (2005). International Classification of Sleep Disorders, second edition (ICSD-2). American Academy of Sleep Medicine. ISBN 0-9657220-2-3.
- ↑ American Academy of Sleep Medicine (2014). International Classification of Sleep Disorders, third edition (ICSD-3). American Academy of Sleep Medicine. ISBN 978-0991543410 . Retrieved 2014-08-29.
- ↑ American Academy of Sleep Medicine (2023). International Classification of Sleep Disorders, third edition, text revision (ICSD-3-TR). American Academy Of Sleep Medicine. ISBN 978-0-9657220-9-4.
- 1 2 Thorpy, Michael J (2012). "Classification of Sleep Disorders". Neurotherapeutics. 9 (4): 687–701. doi:10.1007/s13311-012-0145-6. PMC 3480567 . PMID 22976557.
- ↑ THE INTERNATIONAL CLASSIFICATION OF SLEEP DISORDERS, REVISED Diagnostic and Coding Manual. Westchester, IL 60154-5767, U.S.: American Academy of Sleep Medicine. 2001. ISBN 0-9657220-1-5.
{{cite book}}: CS1 maint: location (link) - ↑ International Classification of Sleep Disorders 3rd Ed. Darien, IL US: American Academy of Sleep Medicine. 2014.
- ↑ Sateia, Michael J. (2014-11-01). "International classification of sleep disorders-third edition: highlights and modifications". Chest. 146 (5): 1387–1394. doi:10.1378/chest.14-0970. ISSN 1931-3543. PMID 25367475.
- 1 2 Sateia, Michael J. (2014). "International Classification of Sleep Disorders - Third Edition: Highlights and Modifications". Chest. 146 (5): 1387–1394. doi:10.1378/chest.14-0970. PMID 25367475.