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  • Title: Motion assimilation for expansion/contraction and rotation and its spatial properties.
    Author: Ohtani Y, Tanigawa M, Ejima Y.
    Journal: Vision Res; 1998 Feb; 38(3):429-38. PubMed ID: 9536366.
    Abstract:
    In a two-frame apparent motion display, a test grating was displaced horizontally or vertically in the presence of an inducer of which component gratings made up expanding/contracting or rotational motion as a whole. In the first experiment, we demonstrated that motion assimilation did occur for the test accompanied by the two-dimensional motion of the inducer. In the second experiment, we showed that the spatial limit of motion assimilation for expansion/contraction or rotation was large, extending over at least a visual angle of 14-21 deg in diameter, but spatial summation did not occur within the limit. The results were discussed in terms of the interaction between local motion detectors and higher-order detectors which monitor global motion of the whole stimulus pattern.
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