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Using a dedicated custom robotic platform, we imaged skin deformation at the contact area between the finger and a flat surface during the onset of tangential sliding movements in four different directions (proximal, distal, radial and ulnar) and with varying normal force and tangential speeds. This simple tactile event evidenced complex mechanics. We observed a reduction of the contact area while increasing the tangential force and proposed to explain this phenomenon by nonlinear stiffening of the skin. The deformation's shape and amplitude were highly dependent on stimulation direction. We conclude that the complex, but highly patterned and reproducible, deformations measured in this study are a potential source of information for the central nervous system and that further mechanical measurement are needed to better understand tactile perceptual and motor performances.<\/jats:p>","DOI":"10.1098\/rsif.2014.0698","type":"journal-article","created":{"date-parts":[[2014,9,24]],"date-time":"2014-09-24T05:20:05Z","timestamp":1411536005000},"page":"20140698","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":164,"title":["Dynamics of fingertip contact during the onset of tangential slip"],"prefix":"10.1098","volume":"11","author":[{"given":"Benoit","family":"Delhaye","sequence":"first","affiliation":[{"name":"Institute of Neuroscience (IoNS), Universit\u00e9 catholique de Louvain, Brussels, Belgium"},{"name":"Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Universit\u00e9 catholique de Louvain, Louvain-la-Neuve, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philippe","family":"Lef\u00e8vre","sequence":"additional","affiliation":[{"name":"Institute of Neuroscience (IoNS), Universit\u00e9 catholique de Louvain, Brussels, Belgium"},{"name":"Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Universit\u00e9 catholique de Louvain, Louvain-la-Neuve, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean-Louis","family":"Thonnard","sequence":"additional","affiliation":[{"name":"Institute of Neuroscience (IoNS), Universit\u00e9 catholique de Louvain, Brussels, Belgium"},{"name":"Cliniques Universitaires Saint-Luc, Physical and Rehabilitation Medicine Department, Universit\u00e9 catholique de Louvain, Brussels, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2014,11,6]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1098\/rsif.2011.0086"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1152\/jn.00249.2002"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tins.2004.08.006"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00237997"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.1979.sp012619"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0959-4388(00)00234-8"},{"key":"e_1_3_3_8_2","unstructured":"Levesque V. 2002 Measurement of skin deformation using fingerprint feature tracking. 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