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Sleep Wake Cycle

Your Body Clock: How Aging Eyes Can Disrupt Your Sleep

Dr. Michael J. Breus | Posted 05.09.2012 | Healthy Living
Dr. Michael J. Breus

Circadian rhythms -- our own internal biological "clock" -- govern our sleep-wake cycle and several other daily rhythms of the body. It's a complicated and finely-tuned system of hormonal and bio-chemical reactions that helps us live in rhythm with the 24-hour day.