cirkadiurnális

Cirkadiurnális refers to biological rhythms that occur with a period of approximately 24 hours. These rhythms, also known as circadian rhythms, are endogenous, meaning they are generated by an internal biological clock. While influenced by external cues like light and dark cycles, the fundamental timing mechanism is internal.

The most well-known circadian rhythm is the sleep-wake cycle, but many other physiological and behavioral processes also exhibit this approximately 24-hour pattern. These include hormone release, body temperature fluctuations, cell regeneration, and cognitive performance. The suprachiasmatic nucleus (SCN) in the hypothalamus of the brain is considered the master clock that regulates these rhythms in mammals.

Disruptions to circadian rhythms can have significant health consequences. Factors such as shift work, jet lag, and irregular sleep schedules can lead to sleep disorders, impaired cognitive function, metabolic issues, and an increased risk of certain diseases. Understanding and maintaining healthy circadian rhythms is crucial for overall well-being. The term "cirkadiurnális" is a Hungarian word equivalent to the English "circadian."