A circadian rhythm is our body's natural "internal clock" that operates on a cycle of approximately 24 hours. It primarily ...

How often do you check to see what time it is? Clocks—on our phones, watches and throughout the house—help guide our routines. They tell us when we should get up, when it's time for bed, if our ...

A junctional escape rhythm is when the heartbeat starts in a different part of the heart than it should. This type of arrhythmia may not need treatment, but a doctor does need to investigate the ...

“Rhythm is sound in motion. It is related to the pulse, the heartbeat, the way we breathe. It rises and falls. It takes us into ourselves; it takes us out of ourselves.” —Edward Hirsh Rhythm. It is ...

Learn what circadian rhythm is and how your body’s internal clock affects sleep, wakefulness, and daily routines. Discover the basics of circadian biology and where to learn more about sleep and ...