Everyone was told as a child that now come out of the water because of the wrinkled hands. The skin

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Why become wrinkled my finger when I'm sitting in the tub much?
Everyone was told as a child that now come out of the water because of the wrinkled hands. The skin on the fingers reaction to water if exposed to beráncosodik, this is the most common explanation is that because the skin Felaz. The skin does not soak up as you wrinkle elsewhere - but not wrinkle, only the fingers. But then what is the cause of wrinkling yet?
Until a few years ago, it was thought that the finger wrinkling is due to the process called osmosis. This means that if the gap between the two solutions in a semi-permeable membrane (such as the cell membranes), the membrane shopping interlar of the small molecules and the water to be admitted, but does not let off the big ones. It was considered that, as the palms and soles are not sebaceous glands in the skin Felaz, i.e. the water flows from the cells under the skin, the cells swell and the water, and this causes wrinkling.
Well, it was revealed recently that it is not true. It seems that no wrinkling of the skin caused by osmosis, but this evolutionary reasons. Recent studies have shown that a neural reaction wrinkling of the fingers, and so occurs that slippery underwater objects easier to grasp, and the toes should be able to hold onto the slippery surface. Wrinkling due to the water reaction causes constriction of blood vessels, which is controlled by the sympathetic nervous system. Moreover, the fact that, if someone is sewn back a torn finger, then there is no longer wrinkle the skin, because the nerves are not working.
The sleeves also observed chimps shopping interlar wrinkles anyway, and evolutionary reason for this may be to facilitate the acquisition of food, wet, slippery environments. The toes wrinkles and helped to walk in the rain in the wet grass, or even while fishing in the stream. During experiments it was found that a pitch, wrinkled fingers more easily placed in a bucket of water in the small glass balls in the test subjects as smooth finger, since the folds help to lead the water from the skin surface. Dry surface, however, is not an advantage for wrinkled finger, so any time the skin becomes smooth again. It was not enough, I want to learn! Send your story!