Why Do Our Fingers Get Wrinkly in Water? An Evolutionary Biologist Explains
The phenomenon of wrinkly fingers in water has long been misunderstood, with the common belief attributing it to osmosis. Recent research reveals that it is actually a reflex mediated by the autonomic nervous system, providing an evolutionary advantage. This discovery highlights the complex interplay between our nervous system and physical responses to environmental conditions.
- ▪For decades, the wrinkling of fingers in water was thought to be due to passive osmosis, but this explanation has been proven incorrect.
- ▪Research indicates that the autonomic nervous system actively mediates the wrinkling response when fingers are submerged in water.
- ▪Patients with nerve damage in their fingers do not experience wrinkling, suggesting that the nervous system plays a crucial role in this phenomenon.
Opening excerpt (first ~120 words) tap to expand
InnovationScienceWhy Do Our Fingers Get Wrinkly In Water? An Evolutionary Biologist ExplainsByScott Travers,Contributor.Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world.Follow AuthorMay 22, 2026, 08:30am EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.Science dismissed the wrinkly finger as osmosis for a century. The real answer runs through your autonomic nervous system, and much further back.gettyWater-induced finger wrinkling is one of those weird biological phenomena that sits in plain sight for so long that no one thinks to question it seriously.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Forbes.
Discussion
0 commentsMore from Forbes
