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

Serrano-Pedraza, Ignacio and Goddard, Paul and Derrington, Andrew M. (2007) Evidence for reciprocal antagonism between motion sensors tuned to coarse and fine features. Journal of Vision, 7 (12). Article 8. ISSN 1534-7362 . (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1167/7.12.8

Abstract

Early visual processing analyses. ne and coarse image features separately. Here we show that motion signals derived from. ne and coarse analyses are combined in rather a surprising way: Coarse and. ne 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.

Item Type: Article
Uncontrolled keywords: motion; motion energy detector; reciprocal inhibition
Subjects: R Medicine > RE Ophthalmology
Divisions: Faculties > Social Sciences > School of Psychology
Depositing User: Suzanne Duffy
Date Deposited: 24 Apr 2008 08:59
Last Modified: 16 Jun 2014 11:25
Resource URI: http://kar.kent.ac.uk/id/eprint/2788 (The current URI for this page, for reference purposes)
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