cirkadiánním

Cirkadiánní refers to a roughly 24-hour cycle in the physiological processes of living beings. These cycles are driven by internal biological clocks, also known as circadian rhythms. The term originates from the Latin words "circa" meaning "around" and "diem" meaning "day." These rhythms regulate a wide range of biological functions, including sleep-wake patterns, hormone release, body temperature, and cell regeneration. In humans, the master circadian clock is located in the suprachiasmatic nucleus (SCN) of the hypothalamus in the brain. Light is the primary environmental cue, or zeitgeber, that synchronizes these internal clocks with the external day-night cycle. Disruptions to circadian rhythms, such as those caused by shift work, jet lag, or irregular sleep schedules, can have negative impacts on health, potentially contributing to sleep disorders, metabolic issues, and mood disturbances. Understanding and respecting circadian rhythms is considered important for maintaining overall well-being and health.