Is the S-opponent chromatic sub-system sluggish?

Vision Research
H E Smithson, J D Mollon

Abstract

The S-opponent pathway has a reputation for being sluggish relative to the L/M-opponent pathway. Cottaris and De Valois [Nature 395 (1998) 896] claim that S-opponent signals are available in Macaque V1 only after 96-135 ms whereas L/M-opponent signals are available after 68-95 ms. Our experiments tested whether this large latency difference could be observed psychophysically. We measured reaction times to S/(L + M) and L/(L + M) increments. Both the equiluminant plane and the tritan line were empirically determined and we used spatio-temporal luminance noise to mask luminance cues. An adaptive staircase progressed according to observers' performance on a 'go, no-go' task and provided concomitant estimates of threshold and of reaction time. When brief stimuli are confined to chromatic channels and presented at equivalent (threshold) levels and when latency is estimated from visually triggered reaction times, we find that the difference between the L/M-opponent and S-opponent sub-systems is, at most, 20-30 ms.

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Citations

Apr 25, 2014·Visual Neuroscience·Hannah E Smithson
Apr 8, 2014·Visual Neuroscience·Soon Keen Cheong, Alexander Nicolaas Johannes Pietersen
Sep 12, 2006·Visual Neuroscience·Marina Danilova, John Mollon
Oct 20, 2006·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Bevil R Conway, Margaret S Livingstone
Mar 7, 2008·Visual Neuroscience·Keizo Shinomori, John S Werner
May 16, 2008·Journal of Neurophysiology·Aline BompasPetroc Sumner
Dec 13, 2006·The European Journal of Neuroscience·Sandra E LehAlain Ptito
Oct 5, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·José M Medina, José A Díaz
Jul 3, 2013·Journal of Physiology, Paris·Mindy ChangTirin Moore
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Oct 4, 2006·Vision Research·H C WalkeyJ L Barbur
Jan 24, 2007·Vision Research·Andrew J ZeleJoel Pokorny
May 4, 2016·Proceedings of the National Academy of Sciences of the United States of America·Nathan J Hall, Carol L Colby
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Jul 5, 2008·Visual Neuroscience·N R A ParryD J McKeefry
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Mar 15, 2016·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·John S Werner
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