Universidad Complutense de Madrid
E-Prints Complutense

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

Impacto

Downloads

Downloads per month over past year

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). 8.1-14. ISSN 1534-7362

[img]
Preview
PDF
684kB

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




Abstract

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.


Item Type:Article
Uncontrolled Keywords:Motion, Motion energy detector, Reciprocal inhibition
Palabras clave (otros idiomas):Movimiento, Detector del movimiento de la energía,Inhibición recíproca
Subjects:Medical sciences > Psychology > Experimental psychology
Medical sciences > Psychology > Perception
ID Code:36299
Deposited On:14 Jul 2016 12:24
Last Modified:02 Sep 2016 11:17

Origin of downloads

Repository Staff Only: item control page