Developing cutaneous cues to quantify geometric changes on human fingertip caused by tactile stimuli and exploring effects of the metrics on compliance discriminability
Characterizing the geometric change of skin surfaces caused by surface compliance remains highly intricate due to the complex nonlinear skin deformation. Efforts have been put on defining kinesthetic and cutaneous cues, such as force rate and contact area, to encode the skin’s deformation under different circumstances. However, solely relying on force and contact area changes is not sufficient and the evolvement of those cues during time courses still remains underexplored. In this paper, we develop cutaneous cues to quantify the nonlinear deformation of human fingertips caused by tactile stimuli. We discover that the developed cues play complementary roles to encode human perception of compliance. We examine the change of differential sensitivity influenced by different indentation rates, as well as the minimum time required for differentiating compliance given a velocity. Using our metrics, people can potentially model the skin mechanics of the fingertip and link them to the afferent responses transduced by tactile stimuli.
Dr. Greg Gerling (ESE, Advisor)
Dr. Reid Bailey (ESE, Chair)
Dr. Seongkook Heo (CS)
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