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Non-24-hour sleep–wake disorder (non-24 or N24SWD) is one of several chronic circadian rhythm sleep disorders (CRSDs). It is defined as a "chronic steady...

Delayed sleep phase disorder (DSPD), more often known as delayed sleep phase syndrome and also as delayed sleep–wake phase disorder, is the delaying of...

sleep phase syndrome (also known as familial advanced sleep phase disorder) is rare. Individuals with FASPS fall asleep and wake up 4–6 hours earlier than...

sleep and awaken at "normal" times for work, school, and other social obligations. Delayed sleep phase disorder, advanced sleep phase disorder, non-24-hour...

Circadian Rhythm Sleep-Wake Disorders: Advanced Sleep-Wake Phase Disorder (ASWPD), Delayed Sleep-Wake Phase Disorder (DSWPD), Non-24-Hour Sleep-Wake Rhythm...

extreme 'morning larks' with 4-hour advanced sleep and other rhythms. This form of familial advanced sleep phase syndrome is caused by a single amino acid...

Irregular sleep–wake rhythm disorder (ISWRD) is a rare form of circadian rhythm sleep disorder. It is characterized by numerous naps throughout the 24-hour period...

Catatonia – Psychiatric behavioural syndrome Sharpless BA (2016). "A clinician's guide to recurrent isolated sleep paralysis". Neuropsychiatric Disease...

quality of life. The terms obstructive sleep apnea syndrome (OSAS) or obstructive sleep apnea–hypopnea syndrome (OSAHS) may be used to refer to OSA when...

behavioral states. Non-REM sleep occurs first and after a transitional period is called slow-wave sleep or deep sleep. During this phase, body temperature...

disorders Delayed sleep phase disorder Advanced sleep phase disorder Non-24-hour sleep–wake disorder Parasomnias – A category of sleep disorders that involve...

Crossover Study of the Effect of Exogenous Melatonin on Delayed Sleep Phase Syndrome". Psychosomatic Medicine. 63 (1): 40–48. doi:10.1097/00006842-200101000-00005...

number of hours late compared to the norm, often misdiagnosed as insomnia Non-24-hour sleep–wake disorder – A faulty body clock and sleep-wake cycle...

Delayed sleep phase syndromes G47.23 Irregular sleep-wake pattern G47.24 Non 24 hour sleep wake cycle G47.28 Other disorder of sleep wake schedule Sleep related...

need for sleep was severely reduced and in some cases not necessary. The duration of sleep in one case decreased to about 2–4 hours per 24-hour period....

Familial natural short sleep is a rare, genetic, typically inherited trait where an individual sleeps for fewer hours than average without suffering from...

Delayed sleep phase disorder Advanced sleep phase disorder Irregular sleep–wake rhythm Non-24-hour sleep–wake disorder Circadian rhythm sleep-wake disorder...

impulsive Sleep onset insomnia is difficulty falling asleep at the beginning of the night, often a symptom of anxiety disorders. Delayed sleep phase disorder...

cardiovascular autonomic abnormalities, obstructive sleep apnea-hypopnea syndrome, restless leg syndrome and an overactive bladder. The cause of fibromyalgia...

spent sleeping. The average adult needs to sleep for 7 to 8 hours every 24 hours, and sleep deprivation can occur if they do not get enough sleep. Acute...