Dynamics of fingertip contact during the onset of tangential slip

被引:115
作者
Delhaye, Benoit [1 ,3 ]
Lefevre, Philippe [1 ,3 ]
Thonnard, Jean-Louis [1 ,2 ]
机构
[1] Catholic Univ Louvain, Inst Neurosci IoNS, B-1200 Brussels, Belgium
[2] Catholic Univ Louvain, Clin Univ St Luc, Phys & Rehabil Med Dept, B-1200 Brussels, Belgium
[3] Catholic Univ Louvain, Inst Informat & Commun Technol Elect & Appl Math, Louvain, Belgium
关键词
skin mechanics; friction; touch; tactile perception; FRICTION; SKIN; MANIPULATION; ROLES; GRIP; HAND;
D O I
10.1098/rsif.2014.0698
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];
摘要
Through highly precise perceptual and sensorimotor activities, the human tactile system continuously acquires information about the environment. Mechanical interactions between the skin at the point of contact and a touched surface serve as the source of this tactile information. 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.
引用
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页数:11
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