A circadian rhythm (/sərˈkeɪdiən/), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any...

Circadian rhythm sleep disorders (CRSD), also known as circadian rhythm sleep-wake disorders (CRSWD), are a family of sleep disorders which affect the...

environment, primarily daylight and darkness. Circadian clocks are the central mechanisms that drive circadian rhythms. They consist of three major components:...

Light effects on circadian rhythm are the response of circadian rhythms to light. Most animals and other organisms have a biological clock that synchronizes...

blue-green algae, see bacterial circadian rhythms). The best studied rhythm in chronobiology is the circadian rhythm, a roughly 24-hour cycle shown by...

2024, through the same Instagram, Drake released three new tracks, "Circadian Rhythm", "SOD", previously featuring Lil Yachty, and "No Face", featuring...

sleep–wake disorder (non-24, N24SWD, or N24) is one of several chronic circadian rhythm sleep disorders (CRSDs). It is defined as a "chronic steady pattern...

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...

a person's circadian rhythm (biological clock) compared to those of societal norms. The disorder affects the timing of biological rhythms including sleep...

is a temporary physiological condition that occurs when a person's circadian rhythm is out of sync with the time zone they are in, and is a typical result...

SCN on circadian-regulated behaviors of vertebrates. In general, external temperature does not influence endothermic animal circadian rhythm because...

crucial role in regulating the sleep-wake cycle, also known as the circadian rhythm, in vertebrates. In vertebrates, melatonin's functions extend to synchronizing...

preceding falling asleep, the condition of being in a drowsy state due to circadian rhythm disorders, or a symptom of other health problems. It can be accompanied...

blue-green algae, see bacterial circadian rhythms). The best studied rhythm in chronobiology is the circadian rhythm, a roughly 24-hour cycle shown by...

A chronotype is the behavioral manifestation of underlying circadian rhythm's myriad of physical processes. A person's chronotype is the propensity for...

circadian rhythm can lead to extremely harmful affects on students' learning and memory processes as well. This is largely in part because circadian rhythm...

sleepwalking and rapid eye movement sleep behavior disorder; bruxism; and circadian rhythm sleep disorders. The use of artificial light has substantially altered...

approximately 24 hours and maintains this rhythm in the absence of external stimuli is considered a circadian rhythm. It is believed that the brain's suprachiasmatic...

sundowning have not been empirically proven, some evidence suggests that circadian rhythm disruption increases sundowning behaviors. In humans, sunset triggers...

biological rhythms such as circadian and circannual rhythms to continue natural functions. Different animals will manage their circadian rhythm differently...

animals that are sensitive to blue light. They are involved in the circadian rhythms and the sensing of magnetic fields in a number of species. The name...

suprachiasmatic nuclei (SCN), the location of the 'master circadian pacemaker'. See SCN and circadian rhythm below. VIP in the pituitary helps to regulate prolactin...

Bacterial circadian rhythms, like other circadian rhythms, are endogenous "biological clocks" that have the following three characteristics: (a) in constant...

Acetabularia has been used to study circadian rhythms. Studies have shown Acetabularia has a diurnal circadian rhythm. These rhythmic changes in respiratory...

Drosophila circadian rhythm is a daily 24-hour cycle of rest and activity in the fruit flies of the genus Drosophila. The biological process was discovered...

Sleep disorders are broadly classified into dyssomnias, parasomnias, circadian rhythm sleep disorders involving the timing of sleep, and other disorders...

or artificially as part of experiments used in the study of circadian and other rhythms in biology. Study subjects are shielded from all time cues, often...

chronobiology, an ultradian rhythm is a recurrent period or cycle repeated throughout a 24-hour day. In contrast, circadian rhythms complete one cycle daily...

factor that is known to affect both the persistence and period of circadian rhythms. Research shows that the CLOCK gene plays a major role as an activator...

social rhythm therapy (IPSRT) is an intervention for people with bipolar disorder (BD). Its primary focus is stabilizing the circadian rhythm disruptions...