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Inicio > Historias > Wrinkles on hands and feet when you are in the water for a long time.
Wrinkles on hands and feet when you are in the water for a long time. |
2025-01-14 |
Automatic transcription of one of the programs broadcast in August 2022 on Onda Cero.
2022 on Onda Cero. With the program I have used (TexPixie), although I told it to do it in Spanish, it gave it to me in English and I had to translate it from English to Spanish and I had to translate it from English to Spanish using DeepL. Eduardo is the program director.
Hello, good evening to all the listeners and, of course, also to you, Eduardo.
We have all noticed that when we spend time in a swimming pool or in the sea, the skin on the fingers, palms of the hands and feet - although we do not normally see them - develops large wrinkles, giving them the appearance of raisins. Traditionally, this was thought to be a normal effect of osmosis. The salinity inside our cells is higher than that of the surrounding water, so water enters the skin. The hypothesis seemed reasonable, but why does this not occur in all the skin, and only in the hands and feet? Something doesn't add up. Many studies have tried to answer this question.
In 2003, neurologists Einar Wilders-Smith and Adeline Chow from Singapore noticed that when the skin wrinkled, blood flow decreased. They then used a local anesthetic cream that constricted the blood vessels. In doing so, the contraction produced wrinkles. The conclusion was quite clear. It is not an osmosis phenomenon, but something related to the nervous system. And it probably developed during our evolution, because it gave us an evolutionary advantage. Subsequent studies have shown that these wrinkled fingers provide a better grip in water or in wet environments, such as tree branches.
That's why the soles of our feet also wrinkle. It also gives us an advantage for picking up shellfish, limpets, or jumping from branch to branch when they are wet. In conclusion, it's not simply osmosis; it's the result of evolution that has given us competitive advantages over other species. That's all for today. Good night. Until next time.
Enviado por flexarorion a las 17:13 | 0 Comentarios | Enlace
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