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The term polyphasic sleep was first used in the early 20th century by psychologist J. S. Szymanski, who observed daily fluctuations in activity patterns. [2] It does not imply any particular sleep schedule. The circadian rhythm disorder known as irregular sleep-wake syndrome is an example of polyphasic sleep in humans.
The current formally correct name of the disorder is Irregular Sleep Wake Rhythm Disorder. [11] This disorder has been referred to by many other terms, including: Irregular Sleep Wake Pattern, [12] irregular sleep wake syndrome, [8] Irregular Sleep Wake Cycle or Irregular Sleep Wake Schedule, [13] and Irregular Sleep Wake Disorder (ISWD). [7]
A sleep disorder, or somnipathy, is a medical disorder of an individual's sleep patterns, in some cases affecting physical, mental, social and emotional functioning. [1] Polysomnography and actigraphy are tests commonly ordered for diagnosing sleep disorders.
With continued use, it can help rebuild a more stabilized sleep pattern.” How does sleep restriction therapy work? The first step in this type of sleep therapy is keeping a sleep diary. For ...
Research suggests that sleep patterns vary significantly across cultures. [142] [143] [144] The most striking differences are observed between societies that have plentiful sources of artificial light and ones that do not. The primary difference appears to be that pre-light cultures have more broken-up sleep patterns.
Habitual smartphone overuse results in bedtime procrastination, and shorter sleep duration and lower sleep quality may trigger many negative emotions responsible for depression and anxiety. [12] Statistics show that disturbed sleep patterns are increasingly common. In 2013, an estimated 40% of U.S. adults slept less than the recommended amount ...
Actigraphy can assess sleep/wake patterns without confining one to the laboratory. The monitors are small, wrist-worn movement monitors that can record activity for up to several weeks. Sleep and wakefulness are determined by using an algorithm that analyzes the movement of the patient and the input of bed and wake times from a sleep diary.
Sleep–wake logs and/or actigraphy monitoring for at least two weeks document a consistent habitual pattern of sleep onsets, usually later than 2 am, and lengthy sleeps. Occasional noncircadian days may occur (i.e., sleep is "skipped" for an entire day and night plus some portion of the following day), followed by a sleep period lasting 12 to ...