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Keyword
attentionawareness
consciousness
electrophysiology
fMRI
feedback
humans
masking
metacontrast
monkeys
optical imaging
paracontrast
psychophysics
standing wave
vision
visual
Journal title
Advances in Cognitive PsychologyDate Published
2008-07-15Publication Volume
3Publication Issue
1Publication Begin page
125Publication End page
152
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Show full item recordAbstract
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.Citation
Macknik SL, Martinez-Conde S. The role of feedback in visual masking and visual processing. Adv Cogn Psychol. 2008 Jul 15;3(1-2):125-52. doi: 10.2478/v10053-008-0020-5. PMID: 20517504; PMCID: PMC2864985.DOI
10.2478/v10053-008-0020-5ae974a485f413a2113503eed53cd6c53
10.2478/v10053-008-0020-5
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