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Temporal characteristics of L and M-cone isolating steady-state ERGs
Kommanapalli, Deepika Murray, I.J. Kremers, Jan Parry, Neil R.A. McKeefry, Declan J.
Kommanapalli, Deepika
Murray, I.J.
Kremers, Jan
Parry, Neil R.A.
McKeefry, Declan J.
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2014-04
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Abstract
Cone isolating stimuli were used to assess the temporal frequency response characteristics of L- and M-cone electroretinograms (ERGs) in nine trichromatic and four dichromatic human observers. The stimuli comprised sinusoidal temporal modulations varying from 5 to 100 Hz. ERGs were recorded using corneal fiber electrodes and subjected to fast Fourier transform analysis. At low temporal frequencies (<10 Hz<10 Hz) the L- and M-cone ERGs had similar amplitude and exhibited minimal differences in apparent latency. At higher flicker rates (>20 Hz>20 Hz) L-cone ERGs had greater amplitudes and shorter apparent latencies than the M-cone responses. These differences between the L- and M-cone ERGs are consistent with their mediation by chromatic and luminance postreceptoral processing pathways at low and high temporal frequencies, respectively.
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Kommanapalli D, Murray IJ, Kremers JJ, Parry NRA & McKeefry D (2014) Temporal characteristics of L and M-cone isolated steady-state ERGs. Journal of the Optical Society of America A. 31(4): A113-A120.
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