You can now read 10 articles in a month for free on BostonGlobe.com. Read as much as you want anywhere and anytime for just 99¢.

The Boston Globe

Lifestyle

The 24-hour internal cycle

Resetting the body’s clock

Circadian rhythms, roughly a 24-hour internal cycle that controls various biological activities, are generated by the brain and numerous organs. With a better understanding of the body’s clocks, researchers are tinkering with resynchronizing daily rhythms disrupted by genetics or erratic work schedules, which could be behind the rise in some diseases.

You have reached the limit of 10 free articles in a month

Stay informed with unlimited access to Boston’s trusted news source.

  • High-quality journalism from the region’s largest newsroom
  • Convenient access across all of your devices
  • Today’s Headlines daily newsletter
  • Subscriber-only access to exclusive offers, events, contests, eBooks, and more
  • Less than 25¢ a week