Send to

Choose Destination
See comment in PubMed Commons below
Commun Integr Biol. 2009 Sep;2(5):422-4.

Effect of fingerprints orientation on skin vibrations during tactile exploration of textured surfaces.

Author information

Laboratoire de Physique Statistique; ENS, Universités Paris 6 & Paris 7, CNRS, Paris, France.


In humans, the tactile perception of fine textures is mediated by skin vibrations when scanning the surface with the fingertip. These vibrations are encoded by specific mechanoreceptors, Pacinian corpuscules (PCs), located about 2 mm below the skin surface. In a recent article, we performed experiments using a biomimetic sensor which suggest that fingerprints (epidermal ridges) may play an important role in shaping the subcutaneous stress vibrations in a way which facilitates their processing by the PC channel. Here we further test this hypothesis by directly recording the modulations of the fingerpad/substrate friction force induced by scanning an actual fingertip across a textured surface. When the fingerprints are oriented perpendicular to the scanning direction, the spectrum of these modulations shows a pronounced maximum around the frequency v/lambda, where v is the scanning velocity and lambda the fingerprints period. This simple biomechanical result confirms the relevance of our previous finding for human touch.


biomechanics; epidermal ridges; fingerprints; somatosensory systems; tactile perception of texture

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for PubMed Central
    Loading ...
    Support Center