Stretching the skin immediately enhances perceived stiffness and gradually enhances the predictive control of grip force
Open Access
- 15 April 2020
- journal article
- research article
- Published by eLife Sciences Publications, Ltd in eLife
Abstract
When manipulating objects, we use kinesthetic and tactile information to form an internal representation of their mechanical properties for cognitive perception and for preventing their slippage using predictive control of grip force. A major challenge in understanding the dissociable contributions of tactile and kinesthetic information to perception and action is the natural coupling between them. Unlike previous studies that addressed this question either by focusing on impaired sensory processing in patients or using local anesthesia, we used a behavioral study with a programmable mechatronic device that stretches the skin of the fingertips to address this issue in the intact sensorimotor system. We found that artificial skin-stretch increases the predictive grip force modulation in anticipation of the load force. Moreover, the stretch causes an immediate illusion of touching a harder object that does not depend on the gradual development of the predictive modulation of grip force.Funding Information
- Israel Science Foundation (823/15)
- National Science Foundation (1632259)
- United States-Israel Binational Science Foundation (2016850)
- Ben-Gurion University of the Negev (ABC Robotics Initiative)
- Ministry of Science and Technology, Israel (Israel-Italy virtual lab on 'Artificial Somatosensation for Humans and Humanoids')
- Ben-Gurion University of the Negev (Tzin Fellowship)
- Ben-Gurion University of the Negev (Lachish Fellowship)
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