The regular recurrence of life activities in 24-hour cycles. Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited ThesaurusAntonymsRelated WordsSynonymsLegend: Switch tonew thesaurus Noun1.circadian rhythm- a daily cycle of activity observed in many ...
As you sleep, your brain cycles through four stages of sleep. The first three are considerednon-rapid eye movement (NREM) sleep, also known as quiet sleep. The fourth israpid eye movement (REM) sleep, also known as active sleep. Each sleep stage has a unique function and role in maintai...
In a full sleep cycle a person goes through all the stages of sleep from one to three, then back down to two briefly, before entering REM sleep. Later cycles have longer periods of REM, so cutting sleep short has adisproportionatelylarge effect on REM. drowsy 英[ˈdraʊzi] 美[ˈdr...
The Cyclic Structure of Sleep: Relationship Between the Macrostructural Slopes of Cycles and Microstructural DynamicsPéter Halász M.D., Ph.D., DSCiRóbert Bódizs Ph.D
sleep (slēp) n. 1. a. A natural periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost, so that there is a decrease in bodily movement and responsiveness to external stimuli. During sleep the brain in humans and...
What's also important is to look at how you're waking up - ie, after how many sleep cycles. If you wake to an alarm every day, your sleep is likely to be interrupted mid-cycle. This is such a common problem it's known as getting out of the wrong side of the bed. This may al...
Before we dive into the various stages of sleep and sleep cycles, it’s essential to know why we need to sleep in the first place. You may consider sleep as a time to wind down and rest, but it’s anextremely active periodcharacterized by rejuvenation, muscle growth, tissue repair, memo...
very occasionally, perhaps twice in a hundred years, sufficient rain falls to form a deep lake that lasts a month or more. In this case, the species passes through two cycles of growth, egg-laying, and death. Thus, on such occasions, the species multiplies considerably, which further ensure...
Using one-night sleep recordings from 852 subjects all living in Uppsala, Sweden, the present study represents one of the largest polysomnography investigations into the association of the 29.53-day long lunar cycle with sleep among men and women and across a wide age range (22–81 years). Fol...
effect of sex, menstrual cycle phase, and monophasic oral contraceptive pill use on local and central arterial stiffness in young adults examine potential sex differences in local and central stiffness, 2) compare stiffness profiles between NAT and OCP cycles, and 3) investigate the relationsh... ...