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Nat Neurosci. 2000 Nov;3(11):1128-33.

Perception of Fourier and non-Fourier motion by larval zebrafish.

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  • 1Department of Physiology and Program in Neuroscience, University of California at San Francisco, Box 0444, Room S762, 513, Parnassus, San Francisco, California 94143-0444, USA.

Abstract

A moving grating elicits innate optomotor behavior in zebrafish larvae; they swim in the direction of perceived motion. We took advantage of this behavior, using computer-animated displays, to determine what attributes of motion are extracted by the fish visual system. As in humans, first-order (luminance-defined or Fourier) signals dominated motion perception in fish; edges or other features had little or no effect when presented with these signals. Humans can see complex movements that lack first-order cues, an ability that is usually ascribed to higher-level processing in the visual cortex. Here we show that second-order (non-Fourier) motion displays induced optomotor behavior in zebrafish larvae, which do not have a cortex. We suggest that second-order motion is extracted early in the lower vertebrate visual pathway.

PMID:
11036270
DOI:
10.1038/80649
[PubMed - indexed for MEDLINE]
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