24-Hour Service: The Circadian Clock

Have you ever woken up minutes before your alarm sounded?  This strange phenomenon isn’t just a bizarre coincidence!  Like most living things, we have an extremely accurate and powerful internal biological clock.  As its name implies, this circadian clock operates over “about a day” and is responsible for controlling our sleep-wake cycles, digestive activities, mood, and many other physiological processes.  In order to achieve such global results, the circadian rhythm operates over a hierarchy of oscillators that function at the cellular, tissue, and systems levels.Continue reading