The sustained–transient channel approach to visual masking: an updated model
The sustained–transient channel approach to visual masking: an updated model
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.
Keywords: parvocellular pathway, magnocellular pathway, sustained channel, transient channel, dual-channel sustained-transient model, RECOD model
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