Mechanisms of visual motion detection

Paul R. Schrater, David C. Knill, Eero P. Simoncelli

Research output: Contribution to journalArticle

Abstract

Visual motion is processed by neurons in primary visual cortex that are sensitive to spatial orientation and speed. Many models of local velocity computation are based on a second stage that pools the outputs of first-stage neurons selective for different orientation, but the nature of this pooling remains controversial. In a human psychophysical detection experiment, we found near-perfect summation of image energy when it was distributed uniformly across all orientations, but poor summation when it was concentrated in specific orientation bands. The data are consistent with a model that integrates uniformly over all orientations, even when this strategy is sub-optimal.

Original languageEnglish (US)
Pages (from-to)64-68
Number of pages5
JournalNature Neuroscience
Volume3
Issue number1
DOIs
StatePublished - Jan 2000

ASJC Scopus subject areas

  • Neuroscience(all)

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