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Laughter is an audible expression or the appearance of happiness, or an inward feeling of joy (laughing on the inside). It may ensue (as a phyiological reaction) from jokes, tickling or other stimuli. It is in most cases a very pleasant sensation.

Laughter is found among various animals, as well as in humans. Among the human species, it is a part of human behavior regulated by the brain, helping humans clarify their intentions in social interaction and providing an emotional context to conversations. Laughter is used as a signal for being part of a group — it signals acceptance and positive interactions with others. Laughter is sometimes seemingly contagious, and the laughter of one person can itself provoke laughter from others as a positive feedback. This may account in part for the popularity of laugh tracks in situation comedy television shows.

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review by . April 14, 2010
posted in Healthy Lifestyle
Maybe Laughter is the Best Medicine
We've all heard that 'Laughter is the best medicine'.  Well, there are many proven benefits from laughing, chuckling or giggling.  Laughing can reduce stress, lower your blood pressure as well as boost your immune system.  Seriously.      The human reaction of laughing is not full understood.  Researchers are currently running tests on the effects of laughter.  Scientists are actually starting to put people into functional MRI machines and make them …
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