Hollins M, Bensmaïa S J, Washburn S
Department of Psychology, University of North Carolina, Chapel Hill 27599, USA.
Somatosens Mot Res. 2001;18(4):253-62. doi: 10.1080/01421590120089640.
The effect of vibrotactile adaptation on the ability to discriminate textured surfaces was examined in three experiments. The surfaces were rectilinear arrays of pyramids produced by etching of silicon wafers. Adaptation to 100-Hz vibration severely hampered discrimination of surfaces with spatial periods below 100 microm (Experiment 1), but had little effect on the discrimination of coarser textures (Experiment 2). To determine which vibrotactile channel--Rapidly Adapting or Pacinian--plays the larger role in mediating the discrimination of fine textures, widely separated adapting frequencies (10 and 250 Hz) were used in Experiment 3. The fact that high- but not low-frequency adaptation interfered with discrimination suggests that the Pacinian system contributes importantly to this ability. Taken as a whole, the results of this study strongly support the duplex theory of tactile texture perception, according to which different mechanisms--spatial and vibrotactile--mediate the perception of coarse and fine textures, respectively.
在三个实验中研究了振动触觉适应对辨别有纹理表面能力的影响。这些表面是通过蚀刻硅晶片产生的金字塔形直线阵列。对100赫兹振动的适应严重妨碍了对空间周期低于100微米的表面的辨别（实验1），但对较粗糙纹理的辨别影响很小（实验2）。为了确定哪个振动触觉通道——快速适应通道或帕西尼小体通道——在介导精细纹理辨别中起更大作用，在实验3中使用了相差很大的适应频率（10和250赫兹）。高频而非低频适应干扰辨别这一事实表明，帕西尼小体系统对这种能力有重要贡献。总体而言，本研究结果有力支持了触觉纹理感知的二元理论，根据该理论，不同机制——空间机制和振动触觉机制——分别介导对粗糙和精细纹理的感知。
