kiertorytmi

Kiertorytmi, also known as circadian rhythm, is an internal biological process that governs the approximately 24-hour cycle of biological activities in living organisms. These rhythmic patterns influence various physiological functions, including sleep-wake cycles, hormone secretion, body temperature, and metabolic processes. The term “kiertorytmi” derives from Latin roots, with "circus" meaning circle and "dies" meaning day, emphasizing the cyclical nature of these rhythms.

In humans and animals, kiertorytmi is primarily regulated by the central nervous system, specifically the suprachiasmatic nucleus (SCN) of the hypothalamus. The SCN receives light information from the retina and synchronizes internal processes with the external environment, particularly the light-dark cycle. This synchronization ensures optimal timing of biological functions to enhance survival and health.

Disruption of kiertorytmi, such as through shift work, jet lag, or exposure to artificial light at night, can lead to circadian rhythm sleep disorders and has been associated with various health issues, including metabolic syndrome, cardiovascular diseases, and mental health disorders.

Research into kiertorytmi has expanded understanding of its mechanisms and implications for health and disease management. Interventions like light therapy, scheduled sleep, and pharmacological treatments aim to restore or optimize these biological cycles. As a fundamental aspect of biological regulation, kiertorytmi highlights the importance of aligning activities with natural rhythms to maintain overall well-being.