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  • Title: Powerful motion illusion caused by temporal asymmetries in ON and OFF visual pathways.
    Author: Del Viva MM, Gori M, Burr DC.
    Journal: J Neurophysiol; 2006 Jun; 95(6):3928-32. PubMed ID: 16709726.
    Abstract:
    Successive presentations of Glass patterns (randomly positioned pairs of dots oriented in a coherent pattern) create a strong sense of global motion along the orientation of the pattern, but ambiguous in direction. Here we report that dynamic "anti-Glass" patterns, created by successive pairs of globally structured pairs of opposite polarity, create an even more powerful motion illusion that is unambiguous in direction: the dark dots always move toward the light. The motion can be cancelled and reversed by introducing a real delay in the presentation of the light dots, suggesting that the effective stimulation of the light is about 3 ms faster than the dark dots. The most plausible explanation for this is that human on channels are faster than off channels, as has been shown in the macaque.
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