Biological rhythms are like internal clocks that regulate various bodily functions, including sleep, appetite, hormone levels, and blood pressure. Disruptions to these rhythms can lead to sleep ...

Circadian rhythms are cycles in the body that occur roughly across 24 hours. In humans, circadian rhythms cause physical and mental changes in the body, including feelings of wakefulness and sleep.

Elevated dementia risks among older adults were associated with weaker and more fragmented circadian rest-activity rhythms ...

Circadian rhythms are the cycles that tell the body when to sleep, wake, and eat—the biological and psychological processes that oscillate in predictable patterns each day. This internal clock is ...