Elsevier

Vision Research

Volume 46, Issue 18, September 2006, Pages 2842-2847
Vision Research

Perception of visual motion coherence by rats and mice

https://doi.org/10.1016/j.visres.2006.02.025Get rights and content
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Abstract

The coherence thresholds to discriminate the direction of motion in random-dot kinematograms were measured in rats and mice. Performance was best in the rats when dot displacement from frame-to-frame was about 2 degrees, and frame duration was less than 100 ms. Mice had coherence thresholds similar to those of rats when tested at the same step size and frame duration. Although the lowest thresholds in the rats and mice occasionally reached human levels, average rodent values (∼25%) were 2–3 times higher than those of humans. These data indicate that the rodent and primate visual systems are similar in that both have local motion detectors and a system for extracting global motion from a noisy signal.

Keywords

Extrastriate cortex
MT
Random dot
Kinematograms
Visual water task
Psychophysics

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