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Scientists have identified two tiipa tickling

February 22 2008

The first studies in this field conducted Aristotle - he found that people are not able to tickle himself, however, beyond this opening did not get. Modern specialists have advanced only slightly, although they were able to distinguish two types of tickling, named in honor of the ancient philosophers. So, gentle tickling, for example, a feather or your fingertips, called knismesisom. If tickle intensively or even with the use of brute force, it is already gargalezis.

As they note, knismesis rarely causes Homeric laughter, though it can be refined torture. It is considered that the response to a light tickle man inherited from his ancestors, who overcame small insects and parasites. "Tickling" the place pointed out that it sucked for him, such as bug-leech, and if people do not get rid of noise, the discomfort only intensified. On the other hand, it is unclear why we are agreeable knismesis performed by persons of the opposite sex.

At the moment the most serious knowledge of the area has such a frivolous Dr. Christine Harris of the University of California at San Diego. For over ten years, it tickles like yourself and volunteers. Commissioned by researcher scientists have even produced a mechanical arm, which was also invited to participate in experiments. During the experiments, Harris came to the conclusion that people react the same way and to "animate" tickle, and mechanical. This, in its view, demonstrates the reflex nature of the reaction to the tickling.

When a child begins to "learn" the emotions, the laughter from tickling is his first reaction to the world. Later, this reflex develops a sense of humor, which in turn helps the child to adapt to the outside world. Harris does not preclude: closed, sullen, do not understand the jokes and stories people grow out of those in my childhood a little tickled.

Apart from the people, only representatives of two other classes of the animal kingdom "entertain" each other tickling: a monkey and rat. True, if the person sometimes uses tickle torture, then the animal is only a game tells

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