The vibrations of texture
The vibrations of texture
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DOI：
10.1080/0899022031000083825
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发表时间：
2003-01-01
影响因子：
0.9
通讯作者：
Hollins, M
中科院分区：
文献类型：
--
作者：
Bensmaïa, SJ;Hollins, M
Pacinian 通道与精细纹理的感知有关（Hollins 等人，Somatosens Mot Res 18：253 - 262，2001a）。在本研究中，我们研究了帕西尼亚介导的粗糙度感知的候选代码。我们使用霍尔效应传感器来记录当一组纹理表面被动地呈现给食指时在皮肤中引起的振动。发现振动的峰值频率随着空间周期的增加而系统地降低。对于除最粗糙表面之外的所有表面，振动功率（根据帕西尼亚系统的光谱灵敏度进行加权）都会随着空间周期而增加。通过改变扫描速度，我们操纵纹理引起的振动的时间和强度特征，并评估操纵对感知粗糙度的影响。我们发现，扫描速度加倍并不会导致振动触觉粗糙度感知频率理论预测的粗糙度大幅下降。另一方面，速度对粗糙度的影响与速度对功率的影响相匹配。我们提出，精细表面（空间周期<200μm）的粗糙度是其引起的振动的帕西尼亚加权功率的函数。
The Pacinian channel has been implicated in the perception of fine textures (Hollins et al., Somatosens Mot Res 18: 253 - 262, 2001a). In the present study, we investigate candidate codes for Pacinian-mediated roughness perception. We use a Hall effect transducer to record the vibrations elicited in the skin when a set of textured surfaces is passively presented to the index finger. The peak frequency of the vibrations is found to decrease systematically as spatial period increases. The power of the vibrations - weighted according to the spectral sensitivity of the Pacinian system - increases with spatial period for all but the coarsest surfaces. By varying the scanning velocity, we manipulate the temporal and intensive characteristics of the texture-induced vibrations and assess the effect of the manipulation on perceived roughness. We find that doubling the scanning velocity does not result in the substantial decrease in roughness predicted by a frequency theory of vibrotactile roughness perception. On the other hand, the effects of speed on roughness match those of speed on power. We propose that the roughness of a fine surface ( spatial period< 200 mu m) is a function of the Pacinian-weighted power of the vibrations it elicits.