circadian rhythm
biological rhythm that occurs over approximately 24 hours
The circadian rhythm refers to the physical, mental, and behavioral changes that follow a roughly 24-hour cycle in response to light and dark cues in the environment. These changes are controlled by the body’s internal biological clock, which is located in a region of the brain called the suprachiasmatic nucleus (SCN).
The circadian rhythm affects a wide range of physiological functions, including sleep-wake cycles, hormone production, digestion, and body temperature. Disruptions to the circadian rhythm can have negative effects on health, including sleep disorders, mood disorders, metabolic disorders, and even cancer.
One of the key ways to regulate the circadian rhythm is through exposure to light. Consistent exposure to bright light in the morning can help reset the biological clock and promote wakefulness during the day, while avoiding bright light at night can help signal to the body that it is time to sleep. Other factors that can influence the circadian rhythm include meal timing, exercise, and social interactions.
Overall, it is important to maintain a consistent sleep schedule and follow healthy habits that support the body’s natural circadian rhythm in order to promote overall health and well-being.
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