Essock E A, Krebs W K, Prather J R
Department of Psychology, University of Louisville, KY 40292.
Exp Brain Res. 1992;91(3):520-4. doi: 10.1007/BF00227848.
The ability of humans to detect striated stimuli on the distal phalanges was found to be highly anisotropic. Observers were much more sensitive to stripes presented in the proximal-distal orientation than to stripes in any other orientation. This tactile anisotropy was contrasted with the well-known visual anisotropy in which sensitivity is greatest for stripes at the horizontal and vertical orientations. We suggest that both the tactile anisotropy and the visual anisotropy are caused by corresponding anisotropies in the distribution of preferred orientations of orientation-selective neurons with in the respective modalities.
研究发现，人类检测远端指骨上横纹刺激的能力具有高度各向异性。观察者对近端 - 远端方向呈现的条纹比其他任何方向的条纹更为敏感。这种触觉各向异性与众所周知的视觉各向异性形成对比，在视觉各向异性中，对水平和垂直方向的条纹敏感度最高。我们认为，触觉各向异性和视觉各向异性都是由各自模态中方向选择性神经元偏好方向分布的相应各向异性引起的。
