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Sleep disorder
The disturbance of normal sleep patterns caused by a broad range of illnesses, including dysfunctional sleep mechanisms, abnormalities in physiological functions during sleep, abnormalities of the biological clock, and sleep disturbances that are induced by factors extrinsic to the sleep process.
Industry: Health care
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Sleep disorder
orexin
Health care; Sleep disorder
Protein neurotransmitter or neuropeptide active in the sleep cycle and in appetite. Peptide family comprised of two peptides, orexin-A (hypocretin-1) and orexin-B (hypocretin-2). Subject of ...
homeostatic regulation of sleep
Health care; Sleep disorder
Refers to the neurobiological signals mediating the pressure or urge to sleep.
circadian rhythm
Health care; Sleep disorder
Related to exhibiting approximately 24-hours, especially to fluctuation of behavioral and physiological functions, including insomnia.
nocturnal
Health care; Sleep disorder
Relating to or taking place at night. This is used to describe an animal behavior characterized by activity during the night and sleeping during the day.
REM period
Health care; Sleep disorder
REM portion of a NREM-REM cycle; early in the night it may be as short as a half-minute, whereas in later cycles longer than an hour.
endogenous rhythms
Health care; Sleep disorder
Rhythms driven by an internal, self-sustaining biological clock rather than by signals that are external to the organism (for example, light).
exogenous rhythms
Health care; Sleep disorder
Rhythms that are directly regulated by an external influence, such as an environmental cue. They are not generated internally by the organism itself.