Stretching the skin immediately enhances perceived stiffness and gradually enhances the predictive control of grip force
Stretching the skin immediately enhances perceived stiffness and gradually enhances the predictive control of grip force
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DOI：
10.7554/elife.52653
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发表时间：
2020-04-15
期刊：
影响因子：
7.7
通讯作者：
Nisky, Ilana
中科院分区：
文献类型：
--
作者：
Farajian, Mor;Leib, Raz;Nisky, Ilana
当操纵物体时，我们使用动觉和触觉信息来形成它们的机械特性的内部表示，以用于认知感知，并使用握力的预测控制来防止它们的滑动。在理解触觉和动觉信息对感知和动作的不可分割的贡献方面，一个主要的挑战是它们之间的自然耦合。与以前通过关注患者受损的感觉处理或使用局部麻醉来解决这个问题的研究不同，我们使用了一项行为研究，该研究使用了一种可编程的机电设备，可以拉伸指尖的皮肤，以解决完整感觉运动系统中的这个问题。我们发现，人工皮肤拉伸增加了预期的负载力的预测握力调制。此外，拉伸导致触摸更硬的物体的立即错觉，这不依赖于握力的预测调制的逐渐发展。
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.