Texture-induced vibrations in the forearm during tactile exploration.
Texture-induced vibrations in the forearm during tactile exploration.
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DOI：
10.3389/fnbeh.2012.00037
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发表时间：
2012
影响因子：
3
通讯作者：
Thonnard JL
中科院分区：
文献类型：
--
作者：
Delhaye B;Hayward V;Lefèvre P;Thonnard JL
人类可以使用主动触摸来检测和区分表面粗糙度的细微变化。到目前为止，人们认为粗糙知觉主要是通过指尖的皮肤和皮下传入来调节的。然而，最近的研究结果表明，在取消了由创伤或药物干预引起的皮肤传入后，受试者区分纹理粗糙度的能力没有显著改变。这些发现表明，体感系统能够从指尖传入以外的其他来源收集纹理信息。因此，手指与粗糙表面相互作用产生的信号必须被传递，以刺激远离接触区域的受体群体。这种传输的特征是在主动探索纹理表面的过程中测量源自指尖的手腕振动，从而传播到手指、手和手腕。对前臂组织中发生的振动进行的光谱分析揭示了与扫描表面和探测速度相关的规律。在周期性纹理的情况下，振动信号包含一个基频分量，该基频分量对应于手指速度除以刺激的空间周期。这种规律性被发现在很大范围内的纹理长度、尺度和扫描速度。对于非周期纹理，振动频谱不包含能够区分不同刺激的明显特征。然而，对于周期性和非周期性刺激，振动的强度可能与扫描表面的微观几何形状有关。
Humans can detect and discriminate between fine variations of surface roughness using active touch. It is hitherto believed that roughness perception is mediated mostly by cutaneous and subcutaneous afferents located in the fingertips. However, recent findings have shown that following abolishment of cutaneous afferences resulting from trauma or pharmacological intervention, the ability of subjects to discriminate between textures roughness was not significantly altered. These findings suggest that the somatosensory system is able to collect textural information from other sources than fingertip afference. It follows that signals resulting of the interaction of a finger with a rough surface must be transmitted to stimulate receptor populations in regions far away from the contact. This transmission was characterized by measuring in the wrist vibrations originating at the fingertip and thus propagating through the finger, the hand and the wrist during active exploration of textured surfaces. The spectral analysis of the vibrations taking place in the forearm tissues revealed regularities that were correlated with the scanned surface and the speed of exploration. In the case of periodic textures, the vibration signal contained a fundamental frequency component corresponding to the finger velocity divided by the spatial period of the stimulus. This regularity was found for a wide range of textural length scales and scanning velocities. For non-periodic textures, the spectrum of the vibration did not contain obvious features that would enable discrimination between the different stimuli. However, for both periodic and non-periodic stimuli, the intensity of the vibrations could be related to the microgeometry of the scanned surfaces.
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DOI：
10.3758/bf03203958
发表时间：
1974-01-01
期刊：
PERCEPTION & PSYCHOPHYSICS
影响因子：
--
作者：
LEDERMAN, SJ
通讯作者：
LEDERMAN, SJ
影响因子：
2.4
作者：
Pourcelot, P;Defontaine, M;Crevier-Denoix, N
通讯作者：
Crevier-Denoix, N
影响因子：
5.3
作者：
CONNOR, CE;HSIAO, SS;JOHNSON, KO
通讯作者：
JOHNSON, KO
影响因子：
56.9
作者：
Scheibert, J.;Leurent, S.;Debregeas, G.
通讯作者：
Debregeas, G.
影响因子：
2.7
作者：
Libouton, Xavier;Barbier, Olivier;Thonnard, Jean-Louis
通讯作者：
Thonnard, Jean-Louis