The surprising secret of wrinkling of wet fingers was revealed
As early as childhood, everyone realizes that every time they dip in the water, their fingers are dancing. But would you have thought that wrinkles were always exactly the same pattern? It’s like having a second, wet fingerprint. According to a new study, the explanation for this is that wrinkles follow the path of blood vessels under the skin, which usually remain in place. But why do wrinkles come from?
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The pattern of wrinkles that occur due to water is always the same.
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Wrinkle formation is caused by narrowing of blood vessels, not swelling of the skin.
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Wrinkles can serve an evolutionary purpose as they help grip underwater underwater.
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The patterns discovered in the mpost may also be suitable for biometric identification in the future.
Many people think that the fingers and toes are wet because the skin swells when it picks up water. About 20 years ago, however, researchers discovered that wrinkling is due to narrowing of blood vessels.
A stronger catch in the water
As a result of prolonged soaking, water is placed in the skin and the amount of salt in the tissue is diluted, which is indicated by the nerves to the brain. The brain He then instructs the standing blood vessels to narrow, pulling in the fingers and toes anchored. This is an evolutionary mechanism that enhances the underwater gripping force by forming the texture – reported to sciencenews.
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Guy German, a biom engineer at Binghamton University in New York, wrote for The Conversation Scientific Portal for two years article About why the skin shrinks with water. However, further questions from a reader were embarrassed: « Does this happen every time and happens the same way? » « I sat there with this and said, I really don’t know, » German said According to the University’s news page.
He and his graduate student were experimenting with three people who drew their right hands into 40 degrees Celsius for 30 minutes. Immediately afterwards, the researchers took photos of each wrinkled fingertip. The participants repeated the handling at least 24 hours later.
Mathematics also confirmed what they saw
When the first and second daily photos were placed on each other (which were obviously taken from the same fingers), wrinkles were discovered that were located in a similar place and form. These pairs standing for wrinkles His mathematical analysis showed that they were almost perfectly fit together. The results of this were published in this month’s issue of Journal of the Mechanical Behavior of Biomedical Materials.
« Now the question I want to answer is whether this happens on, say, a year, 10 years or 50 years? » German says. Not sure about the wrinkles that make up blood vessels Its arrangement remains the same as fingerprints for a lifetime. If so, the wrinkle pattern of the fingers can one day help with biometric or forensic identification, he said.
« I really like the origin of this story from a simple, innocent question. It opened a huge door to a fundamentally unknown science, » German said.
