Fahle M
Exp Brain Res. 1986;63(1):113-24. doi: 10.1007/BF00235653.
Discrimination of curvature in nearly straight stimuli was measured for twelve stimulus orientations, corresponding to the hours of the clock, at eleven positions in the visual field of human observers. Displacements below the diameter of a photoreceptor can be detected foveally. In the periphery of the visual field, stimuli oriented towards the fovea yield best results. This anisotropy of orientation discrimination seems not to have an optical cause. It has a close correlation both to the structure and functional properties of cat ganglion cells, to the organization of receptive fields in area 17 and to the geometry of ocular dominance stripes.
在人类观察者视野的11个位置，针对对应时钟小时数的12种刺激方向测量了对几乎笔直刺激的曲率辨别。在中央凹可以检测到低于光感受器直径的位移。在视野的周边，朝向中央凹的刺激产生最佳结果。这种方向辨别上的各向异性似乎没有光学原因。它与猫神经节细胞的结构和功能特性、17区感受野的组织以及眼优势带的几何形状都密切相关。
