【摘要】 本研究旨在讨论人在探索物体表面时由物体表面摩擦属性的影响而引起的脑电变化.而事件相关电位技术是观测这一变化的理想手段.试验通过Neuroscan 64导事件相关电位采集系统来采集脑电信号,采用Oddball范式来诱发P300电位,并观察摩擦诱发的事件相关电位的认知成分P300的潜伏期和峰值特点.样本为摩擦系数不一样但其他属性基本一致的三种纸类.受试者通过手指主动触摸的方式判断物体表面摩擦力大小,观察此过程中的事件相关电位.试验发现,摩擦系数大样本诱发的P300的潜伏期小,峰值大.摩擦系数小的样本诱发的P300潜伏期大,峰值小.更多还原

【Abstract】 Tactile perception is a complex process that relies on personal experience, surface topography and the methods we scanning the surface. Friction plays an important role on tactile perception, which is mediated by skin vibrations induced by tangential force between skin and surface. To establish the relationship between tactile perception and frictions, the latency and peak of P300 evoked by Oddball mode was observed and analyzed using an event related potentials collecting system. Three paper samples with different coefficient of friction were used for experiments. The result shows that the latency was small and peak value was large of P300 for sample with large coefficient of friction. It was opposite for small coefficient of friction.更多还原