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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 4 — Apr. 1, 2014
  • pp: A159–A169

Incremental and decremental L- and M-cone-driven ERG responses: I. Square-wave pulse stimulation

Declan McKeefry, Jan Kremers, Deepika Kommanapalli, Naveen K. Challa, Ian J. Murray, John Maguire, and Neil R. A. Parry  »View Author Affiliations


JOSA A, Vol. 31, Issue 4, pp. A159-A169 (2014)
http://dx.doi.org/10.1364/JOSAA.31.00A159


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Abstract

Electroretinograms (ERGs) elicited by transient, square-wave L- and M-cone isolating stimuli were recorded from human trichromatic (n=19) and dichromatic (n=4) observers. The stimuli were generated on a four primary LED stimulator and were equated in terms of cone modulation (cone contrast=0.11) and retinal illuminance (12,000 trolands). L- and M-cone isolated ERGs had waveforms similar to those observed for luminance responses. However, M-cone ERGs exhibited a phase reversal in their responses to onset and offset stimuli relative to the L-cone responses. This on–off response reversal was observed in trichromats but not dichromats. Simultaneous counterphase and inphase combinations of L- and M-cone isolating stimuli generated responses that reflected chromatic and luminance processing, respectively. We conclude that L- and M-cone specific ERGs provide a measure of how photoreceptors contribute to postreceptoral mechanisms.

© 2014 Optical Society of America

OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.4270) Vision, color, and visual optics : Vision system neurophysiology
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment
(330.5310) Vision, color, and visual optics : Vision - photoreceptors

ToC Category:
Retinal and cortical color processing

History
Original Manuscript: September 30, 2013
Revised Manuscript: December 16, 2013
Manuscript Accepted: December 17, 2013
Published: February 4, 2014

Virtual Issues
Vol. 9, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Declan McKeefry, Jan Kremers, Deepika Kommanapalli, Naveen K. Challa, Ian J. Murray, John Maguire, and Neil R. A. Parry, "Incremental and decremental L- and M-cone-driven ERG responses: I. Square-wave pulse stimulation," J. Opt. Soc. Am. A 31, A159-A169 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-4-A159

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