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Your fingers 'prune' the exact same way each time, study suggests

  • Researchers at Binghamton University published a May 2025 study showing fingers wrinkle in a consistent pattern each time after water immersion.
  • The study tested three volunteers whose fingers were submerged in water for 30 minutes twice, 24 hours apart, to verify if wrinkle patterns repeated.
  • Wrinkles form from blood vessel constriction controlled by the sympathetic nervous system, and because vessels remain mostly static, the pattern repeats predictably.
  • Professor Guy German explained that since blood vessels remain largely fixed in relation to one another, wrinkle patterns develop consistently, a finding their research confirmed.
  • The findings suggest possible forensic and diagnostic uses, such as identifying nerve damage, though additional research on larger groups remains necessary to confirm results.
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scientias.nl broke the news in Middelharnis, Netherlands on Monday, May 12, 2025.
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