Dichoptic metacontrast masking reveals a central basis for monoptic chromatic induction

Olson, Conrad X.; Boynton, Robert M.

doi:10.3758/bf03206331

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…The existence of “dichoptic” visual masking is one of the main reasons visual masking has been considered a cortical process (Harris & Willis, 2001; Kolers & Rosner, 1960; McFadden & Gummerman, 1973; McKee, Bravo, Smallman, & Legge, 1995; McKee, Bravo, Taylor, & Legge, 1994; Olson & Boynton, 1984; Weisstein, 1971). However, just because dichoptic masking must arise from binocular cortical circuits, does not mean that monoptic masking may not arise from monocular subcortical circuits (Macknik, 2006; Macknik & Martinez-Conde, 2004a).…”

Section: Arguments Against Feedback In Visual Maskingmentioning

confidence: 99%

The role of feedback in visual masking and visual processing

Macknik¹,

Martínez-Conde²

2007

Advances in Cognitive Psychology

102

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This paper reviews the potential role of feedback in visual masking, for and against. Our analysis reveals constraints for feedback mecha- nisms that limit their potential role in visual masking, and in all other general brain functions. We propose a feedforward model of visual masking, and provide a hypothesis to explain the role of feedback in visual masking and visual processing in general. We review the anato-my and physiology of feedback mechanisms, and propose that the massive ratio of feedback versus feedforward connections in the visual system may be explained solely by the critical need for top-down attentional modulation. We discuss the merits of visual masking as a tool to discover the neural correlates of consciousness, especially as compared to other popular illusions, such as binocular rivalry. Finally, we propose a new set of neurophysiological standards needed to establish whether any given neuron or brain circuit may be the neural substrate of awareness.

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Section: Arguments Against Feedback In Visual Maskingmentioning

confidence: 99%

The role of feedback in visual masking and visual processing

Macknik¹,

Martínez-Conde²

2007

Advances in Cognitive Psychology

102

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“…We chose to examine these effects in primates because the psychophysics of visual masking in primates is similar if not identical to that of humans 23 . We studied area V-1 because previous psychophysical studies found that perception of a target presented to one eye can be blocked by a mask presented to the other eye [24][25][26][27] , suggesting that masking is induced in the cortex, where inputs from the two eyes are first combined 39 . First we characterized the receptive field of each single unit (or sometimes multiple-unit activity), with a combination of hand mapping and eye-position-corrected, reverse-correlation methods 21,22 .…”

Section: Neural Correlates Of Visual Maskingmentioning

confidence: 99%

Neuronal correlates of visibility and invisibility in the primate visual system

1998

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A brief visual target stimulus may be rendered invisible if it is immediately preceded or followed by another stimulus. This class of illusions, known as visual masking, may allow insights into the neural mechanisms that underlie visual perception. We have therefore explored the temporal characteristics of masking illusions in humans, and compared them with corresponding neuronal responses in the primary visual cortex of awake and anesthetized monkeys. Stimulus parameters that in humans produce forward masking (in which the mask precedes the target) suppress the transient on-response to the target in monkey visual cortex. Those that produce backward masking (in which the mask comes after the target) inhibit the transient after-discharge, the excitatory response that occurs just after the disappearance of the target. These results suggest that, for targets that can be masked (those of short duration), the transient neuronal responses associated with onset and turning off of the target may be important in its visibility.

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Identification and adaptation of hue: Parallels in the operation of mechanisms that underlie categorical perception in vision and in audition

Bornstein

Korda²

1985

Psychol. Res

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Dichoptic metacontrast masking reveals a central basis for monoptic chromatic induction

Cited by 5 publications

References 23 publications

The role of feedback in visual masking and visual processing

The role of feedback in visual masking and visual processing

Neuronal correlates of visibility and invisibility in the primate visual system

Identification and adaptation of hue: Parallels in the operation of mechanisms that underlie categorical perception in vision and in audition

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