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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 11 — Nov. 1, 2009
  • pp: 2346–2352

Visual sensitivity and cortical response to the temporal envelope of amplitude-modulated flicker

Yosuke Okamoto, Seiji Nakagawa, Kenji Fujii, and Takashi Yano  »View Author Affiliations

JOSA A, Vol. 26, Issue 11, pp. 2346-2352 (2009)

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To investigate the perception of a temporal envelope of flickering light is important for understanding nonlinear temporal processing in the visual system. The influence of the frequency components of a flickering light on the perception of the envelope remains unclear, with few studies having investigated the cortical activities for the envelope. We investigated the detection thresholds, brightness, and magnetoencephalographic responses related to amplitude-modulated (AM) flickering lights. The results showed that the sensitivity to flicker at the envelope periodicity of the AM flickering light was lower for a high-frequency carrier (40 Hz) than for a lower-frequency one (10, 20, or 30 Hz). Also, the primary visual cortex responded at the frequency corresponding to the envelope periodicity of the AM flickering light, and the strength of the cortical response reflected the brightness of the flicker at the envelope periodicity.

© 2009 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1880) Vision, color, and visual optics : Detection
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment
(330.5380) Vision, color, and visual optics : Physiology
(330.5510) Vision, color, and visual optics : Psychophysics

ToC Category:
Vision, Color, and Visual Optics

Original Manuscript: August 11, 2009
Manuscript Accepted: September 15, 2009
Published: October 14, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Yosuke Okamoto, Seiji Nakagawa, Kenji Fujii, and Takashi Yano, "Visual sensitivity and cortical response to the temporal envelope of amplitude-modulated flicker," J. Opt. Soc. Am. A 26, 2346-2352 (2009)

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