Bruno G. Breitmeyer and Haluk ÖĞmen
- Published in print:
- 2006
- Published Online:
- April 2010
- ISBN:
- 9780198530671
- eISBN:
- 9780191728204
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198530671.003.0005
- Subject:
- Psychology, Cognitive Psychology
This chapter discusses the sustained-transient channel approach to visual masking. First, it presents neurophysiological data on primate parvocellular and magnocellular pathways and their cortical ...
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This chapter discusses the sustained-transient channel approach to visual masking. First, it presents neurophysiological data on primate parvocellular and magnocellular pathways and their cortical targets. Particular attention is given to the differential dynamics of these pathways. Next, deriving from several paradigms, systems-level evidence is presented for the existence of sustained and transient channels in primates, including spatiotemporal contrast sensitivity, visual reaction time, uniform-field flicker masking, and visual pattern masking. Finally, Breitmeyer & Ganz's sustained-transient dual channel model is introduced, followed by the REtino-COrtical Dynamics (RECOD) model. The explanatory scope of the dual-channel RECOD model is discussed by highlighting how it accounts for 32 major aspects of visual masking. The chapter also includes comparisons of these dual-channel models with other models of visual masking.Less
This chapter discusses the sustained-transient channel approach to visual masking. First, it presents neurophysiological data on primate parvocellular and magnocellular pathways and their cortical targets. Particular attention is given to the differential dynamics of these pathways. Next, deriving from several paradigms, systems-level evidence is presented for the existence of sustained and transient channels in primates, including spatiotemporal contrast sensitivity, visual reaction time, uniform-field flicker masking, and visual pattern masking. Finally, Breitmeyer & Ganz's sustained-transient dual channel model is introduced, followed by the REtino-COrtical Dynamics (RECOD) model. The explanatory scope of the dual-channel RECOD model is discussed by highlighting how it accounts for 32 major aspects of visual masking. The chapter also includes comparisons of these dual-channel models with other models of visual masking.
Edmund C. Lalor, Barak A. Pearlmutter, and John J. Foxe
- Published in print:
- 2009
- Published Online:
- August 2013
- ISBN:
- 9780262013086
- eISBN:
- 9780262258876
- Item type:
- chapter
- Publisher:
- The MIT Press
- DOI:
- 10.7551/mitpress/9780262013086.003.0001
- Subject:
- Neuroscience, Techniques
This chapter discusses a method for obtaining a novel visual event-related potential known as the visual evoked spread spectrum analysis (VESPA) that seeks to address the limitations of the standard ...
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This chapter discusses a method for obtaining a novel visual event-related potential known as the visual evoked spread spectrum analysis (VESPA) that seeks to address the limitations of the standard visual evoked potential (VEP). It introduces the broader reverse correlation technique that has seen widespread use in the analysis of many physiological systems. The chapter describes the VESPA method itself, including the differences between the standard VEP and the VESPA, and some proposed applications and extensions, and shows that VESPA may actually reflect mostly activity of parvocellular pathways. The auditory and visual responses demonstrated in the chapter indicate the utility of the VESPA method in investigation of multisensory integration processes.Less
This chapter discusses a method for obtaining a novel visual event-related potential known as the visual evoked spread spectrum analysis (VESPA) that seeks to address the limitations of the standard visual evoked potential (VEP). It introduces the broader reverse correlation technique that has seen widespread use in the analysis of many physiological systems. The chapter describes the VESPA method itself, including the differences between the standard VEP and the VESPA, and some proposed applications and extensions, and shows that VESPA may actually reflect mostly activity of parvocellular pathways. The auditory and visual responses demonstrated in the chapter indicate the utility of the VESPA method in investigation of multisensory integration processes.
