Visual sensitivity and cortical response to the temporal envelope of amplitude-modulated flicker
JOSA A, Vol. 26, Issue 11, pp. 2346-2352 (2009)
http://dx.doi.org/10.1364/JOSAA.26.002346
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Abstract
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
History
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
Citation
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)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-11-2346
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