Posted on 01/16/2005 3:03:17 AM PST by The Raven
If by "addicting," you mean do people develop tolerance to it, such that they need progressively higher doses to achieve the same result, the answer is no.
Found the following to be of interest:
'Edgar, ... . gained fame when he discovered the functional role of the clock structure in the brain that keeps us awake. Known as the suprachiasmatic nucleus, this structure rings like an alarm throughout the day, growing quietest in the predawn hours. At the same time, another system called "sleep homeostasis" tracks how long we've been up and makes us grow sleepy when we've been out of bed for too long. The balance of these two systems, Edgar realized, regulates our daily sleep-wake rhythms.'
BTTT
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