Investigating the role of the magnocellular pathway in object- and location-based attention

Boyd, Megan; Guenther, Benjamin A.; Brown, James M.

doi:10.1167/7.9.1078

Cited by 2 publications

(1 citation statement)

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“…Scientists using different measures (eg psychophysical, physiological) and methods (eg visual search, covert cuing tasks) have begun to reveal the complexities of the relationship between attention and P and M activity (Boyd et al 2007;Brown 2009;Cheng et al 2004;Di Russo et al 2001;Lu 2006;Srinivasan and Brown 2006;Yeshurun 2004;Yeshurun and Carrasco 1999;Yeshurun and Levy 2003). We chose an exogenous cuing paradigm requiring subjects to detect spatial-frequency-specific targets appearing on a uniform background.…”

Section: Methodsmentioning

confidence: 99%

Magnocellular and Parvocellular Pathway Influences on Location-Based Inhibition-Of-Return

Brown

Guenther

2012

Perception

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The roles of the parvocellular (P) and magnocellular (M) retino-geniculo-cortical pathways during shifts of visual attention were investigated by creating M/dorsal-biased (eg low spatial frequency target, no objects present) and P/ventral-biased (ie high spatial frequency target, the perception of 3-D objects) stimulus conditions and measuring location-based inhibition-of-return (IOR). P/ventral-biased conditions produced the greatest IOR. M/dorsal-biased conditions produced the least IOR, in one instance eliminating it altogether. The results indicate a close relationship between IOR magnitude and relative P/ventral and M/dorsal activity with location-based IOR related more to P/ventral than to M/dorsal activity.

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