Sensory Information Processing Mechanisms of Touch Discrimination for Fine Surface Textures

本研究的目的是评估触觉对细微表面纹理的识别能力，并对这种能力的感觉信息处理机制进行评估。在最重要的实验中，采用氧化铝砂纸作为刺激。它们的粗砂值分别为400、600、1200、2000、3000、4000和8000。采用双向强迫选择技术测量差值阈值，可确定的差值范围在2.4微米到3.0微米之间。根据韦伯阈值的分数和人类神经信息处理能力的限制，被试只能根据表面不平度中存在的幅度信息来判断粗糙程度。

Purposes of this study were to evaluate discriminating ability of touch for fine surface textures and to estimate sensory information processing mechanisms for the abilityIn the most important experiment aluminum oxide abrasive papers were adopted as the stimuli. Their grit values were 400, 600, 1200, 2000, 3000, 4000, and 8000. Difference thresholds were measured with two-way forced choice technique, and were between 2.4 mum and 3.0 mum when they could be determined.It was reasoned, based on Weber's fractions of difference thresholds and on the limits of neural information processing ability in humans, that the subjects knew degrees of roughness only from amplitude information present in surface unevenness.