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Evidence for reciprocal antagonism between motion sensors tuned to coarse and fine features

Lookup NU author(s): Dr Ignacio Serrano-PedrazaORCiD, Professor Andrew Derrington


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Early visual processing analyses fine and coarse image features separately. Here we show that motion signals derived from fine and coarse analyses are combined in rather a surprising way: Coarse and fine motion sensors representing the same direction of motion inhibit one another and an imbalance can reverse the motion perceived. Observers judged the direction of motion of patches of filtered two-dimensional noise, centered on 1 and 3 cycles/deg. When both sets of noise were present and only the 3 cycles/deg noise moved, judgments were reversed at short durations. When both sets of noise moved, judgments were correct but sensitivity was impaired. Reversals and impairments occurred both with isotropic noise and with orientation-filtered noise. The reversals and impairments could be simulated in a model of motion sensing by adding a stage in which the outputs of motion sensors tuned to 1 and 3 cycles/deg and the same direction of motion were subtracted from one another. The subtraction model predicted and we confirmed in experiments with orientation-filtered noise that if the 1 cycle/deg noise flickered and the 3 cycles/deg noise moved, the 1 cycle/deg noise appeared to move in the opposite direction to the 3 cycles/deg noise even at long durations.

Publication metadata

Author(s): Serrano-Pedraza I, Goddard P, Derrington AM

Publication type: Article

Publication status: Published

Journal: Journal of Vision

Year: 2007

Volume: 7

Issue: 12

Pages: 1-14

Print publication date: 20/09/2007

ISSN (electronic): 1534-7362

Publisher: Association for Research in Vision and Ophthalmology


DOI: 10.1167/7.12.8


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