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

Let There Be Light!

When I was an undergraduate student, I was an expert at pulling “all-nighter” study sessions prior to exams and project deadlines.  Once everything was said and done the next day, many of my classmates moved on to celebratory happy hours, while the only thing that could make me happy at the time was heading to bed!  Even after some rest, however, I was slow, lethargic, and felt misplaced.Continue reading