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Temporal nulling of induction from spatial patterns modulated in time

  • FLORENT AUTRUSSEAU (a1) (a2) and STEVEN K. SHEVELL (a1)

Abstract

Temporally varying chromatic-inducing light was used to infer receptive-field organization. Time-varying shifts in color appearance within a test field were induced by a surrounding chromatic pattern; the shifts were then nulled by adding a time-varying stimulus to the test area so the observer perceived a steady test. This method measured chromatic induction without requiring an observer to judge the color appearance of the test. The induced color shifts were consistent with a +s/−s spatially antagonistic neural receptive field, which also accounts for color shifts induced by static chromatic patterns (Monnier & Shevell, 2003, Monnier & Shevell, 2004). The response of this type of receptive-field, which is found only in the visual cortex, increases with S-cone stimulation at its center and decreases with S-cone stimulation within its surround. The measurements also showed a negligible influence of temporal inducing frequency in the range 0.5–4 Hz.

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Corresponding author

Address correspondence and reprint requests to: Florent Autrusseau, Polytech'Nantes, IRCCyN, Rue Ch. Pauc, La Chantrerie, BP 50609, 44306 Nantes Cedex 03. France. E-mail: Florent.Autrusseau@univ-nantes.fr

References

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Visual Neuroscience
  • ISSN: 0952-5238
  • EISSN: 1469-8714
  • URL: /core/journals/visual-neuroscience
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