One Plus One Doesn’t Always Equal Two In Circadian Math

Like a wristwatch that needs to be wound daily for accurate time-telling, the human circadian system - the biological cycles that repeat approximately every 24 hours - requires daily light exposure to the eye’s retina to remain synchronized with the solar day. In a new study published in the June issue of Neuroscience Letters, researchers have demonstrated that when it comes to the circadian system, not all light exposure is created equal.

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Filed under: Biology on June 10th, 2008