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

Mckeefry D, Kremers J, Kommanapalli D, Challa NK, Murray IJ, Maguire J, Parry NRA (2014)

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Publication Type: Journal article

Publication year: 2014

Journal

Book Volume: 31

Pages Range: A159-69

Journal Issue: 4

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.

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How to cite

APA:

Mckeefry, D., Kremers, J., Kommanapalli, D., Challa, N.K., Murray, I.J., Maguire, J., & Parry, N.R.A. (2014). Incremental and decremental L- and M-cone-driven ERG responses: I. Square-wave pulse stimulation. Journal of the Optical Society of America A-Optics Image Science and Vision, 31(4), A159-69.

MLA:

Mckeefry, Declan, et al. "Incremental and decremental L- and M-cone-driven ERG responses: I. Square-wave pulse stimulation." Journal of the Optical Society of America A-Optics Image Science and Vision 31.4 (2014): A159-69.

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