Tsirkadiaanse

Tsirkadiaanse refers to biological processes that oscillate with a roughly 24-hour cycle. These endogenous rhythms, often called circadian rhythms, are fundamental to the functioning of most living organisms, from bacteria to humans. The term "circadian" itself derives from the Latin words "circa" (about) and "dies" (day).

These internal biological clocks are synchronized with external environmental cues, primarily the light-dark cycle. Light exposure signals to the brain, specifically the suprachiasmatic nucleus (SCN) in the hypothalamus, which then coordinates the body's physiological and behavioral activities. This synchronization ensures that processes like sleep-wake cycles, hormone release, body temperature regulation, and metabolism occur at appropriate times of the day and night.

Disruptions to these tsirkadiaanse rhythms, such as those caused by shift work, jet lag, or irregular sleep patterns, can have significant negative health consequences. These can include sleep disorders, impaired cognitive function, metabolic disturbances, and an increased risk of certain chronic diseases. Understanding and maintaining healthy tsirkadiaanse rhythms is crucial for overall well-being.