Functional Gradients Facilitate Tactile Sensing in Elephant Whiskers
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Keratin composites enable animals to hike with hooves, fly with feathers, and sense with skin. Mammalian whiskers are elongated keratin rods attached to tactile skin structures that extend the animal's sensory volume. We investigated the whiskers that cover Asian elephant (Elephas maximus) trunks and found that they are geometrically and mechanically tailored to facilitate tactile perception by encoding contact location in the amplitude and frequency of the vibrotactile signal felt at the whisker base. Elephant whiskers emerge from armored trunk skin and shift from a thick, circular, porous, stiff base to a thin, ovular, dense, soft tip. These functional gradients of geometry, porosity, and stiffness independently tune the neuromechanics of elephant trunk touch to facilitate highly dexterous manipulation while ensuring whisker durability.
| Author(s): | Andrew K. Schulz and Lena V. Kaufmann and Lawrence T. Smith and Deepti S. Philip and Hilda David and Jelena Lazovic and Michael Brecht and Gunther Richter and Katherine J. Kuchenbecker |
| Links: | |
| Journal: | Science |
| Volume: | 391 |
| Number (issue): | 6786 |
| Pages: | 712--718 |
| Year: | 2026 |
| Month: | February |
| Day: | 12 |
| BibTeX Type: | Article (article) |
| DOI: | 10.1126/science.adx8981 |
| State: | Published |
| Note: | Lena V. Kaufmann and Lawrence T. Smith contributed equally to this work |
BibTeX
@article{Schulz26-S-Whiskers,
title = {Functional Gradients Facilitate Tactile Sensing in Elephant Whiskers},
journal = {Science},
abstract = {Keratin composites enable animals to hike with hooves, fly with feathers, and sense with skin. Mammalian whiskers are elongated keratin rods attached to tactile skin structures that extend the animal's sensory volume. We investigated the whiskers that cover Asian elephant (Elephas maximus) trunks and found that they are geometrically and mechanically tailored to facilitate tactile perception by encoding contact location in the amplitude and frequency of the vibrotactile signal felt at the whisker base. Elephant whiskers emerge from armored trunk skin and shift from a thick, circular, porous, stiff base to a thin, ovular, dense, soft tip. These functional gradients of geometry, porosity, and stiffness independently tune the neuromechanics of elephant trunk touch to facilitate highly dexterous manipulation while ensuring whisker durability.},
volume = {391},
number = {6786},
pages = {712--718},
month = feb,
year = {2026},
note = {Lena V. Kaufmann and Lawrence T. Smith contributed equally to this work},
author = {Schulz, Andrew K. and Kaufmann, Lena V. and Smith, Lawrence T. and Philip, Deepti S. and David, Hilda and Lazovic, Jelena and Brecht, Michael and Richter, Gunther and Kuchenbecker, Katherine J.},
doi = {10.1126/science.adx8981},
month_numeric = {2}
}