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Replies to post #97127 on America Demands Justice NOW
When you watch TV, brain activity switches from the left to the right hemisphere. In fact, experiments conducted by researcher Herbert Krugman showed that while viewers are watching television, the right hemisphere is twice as active as the left, a neurological anomaly. The crossover from left to right releases a surge of the body's natural opiates: endorphins, which include beta-endorphins and enkephalins. Endorphins are structurally identical to opium and its derivatives (morphine, codeine, heroin, etc.). Activities that release endorphins (also called opioid peptides) are usually habit-forming (we rarely call them addictive). These include cracking knuckles, strenuous exercise, and orgasm. External opiates act on the same receptor sites (opioid receptors) as endorphins, so there is little difference between the two.
In fact, strenuous exercise, which produces the nominal "runner's high"- a release of endorphins that flood the system, can be highly addictive, to the point where "addicts" who abruptly stop exercising experience opiate-withdrawal symptoms, namely migraine headaches. These migraines are caused by a dysfunction in opioid receptors, which are accustomed to the steady influx of endorphins.
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