Pacinian representations of fine surface texture
Pacinian representations of fine surface texture
复制标题
DOI：
10.3758/bf03193537
复制
发表时间：
2005-07-01
期刊：
影响因子：
--
通讯作者：
Hollins, M
中科院分区：
文献类型：
--
作者：
Bensmaïa, S;Hollins, M
受试者提出了对纹理细密的刺激，并指示他们的相异性，使用自由幅度估计。受试者还沿着四个纹理连续体（粗糙度、硬度、粘性和温暖度）中的每一个对刺激进行沿着评级。在随后的实验中，我们使用霍尔效应传感器来测量受试者指尖皮肤在刺激扫描时产生的振动，我们希望评估纹理的感知差异在多大程度上可以用皮肤引起的振动的感知差异来解释。为此，我们调用了一个模型，该模型表征了振动刺激的帕西尼表象。从模型中，我们计算了每对中两个刺激的振动表示的差异。我们发现，大部分的差异，在感知不同的纹理占的差异，在帕西尼表示的振动，他们产生的。我们的研究结果进一步表明，由帕西尼系统传达的纹理信息涉及表面粗糙度，并可能，粘性。
Subjects were presented with pairs of finely textured stimuli and were instructed to rate their dissimilarity, using free magnitude estimation. The subjects also rated the stimuli along each of four textural continua: roughness, hardness, stickiness, and warmth. In subsequent experimental sessions, we used a Hall effect-transducer to measure the vibrations produced in the subjects' fingertip skin as the stimuli were scanned across it. We wished to assess the extent to which the perceptual dissimilarity of the textures could be explained in terms of the perceptual dissimilarity of the vibrations they elicited in the skin. To that end, we invoked a model characterizing the Pacinian representation of a vibratory stimulus. From the model, we computed the difference in the vibratory representations of the two stimuli in each pair. We found that the bulk of the variance in perceived dissimilarity of the textures was accounted for by differences in the Pacinian representations of the vibrations they produced. Our results further suggested that the textural information conveyed by the Pacinian system concerns surface roughness and, possibly, stickiness.