Distinct representations for shifts of spatial attention and changes of reward contingencies in the human brain.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Annalisa TosoniMaurizio Corbetta

Abstract

Success in a dynamically changing world requires both rapid shifts of attention to the location of important objects and the detection of changes in motivational contingencies that may alter future behavior. Here we addressed the relationship between these two processes by measuring the blood-oxygenation-level-dependent (BOLD) signal during a visual search task in which the location and the color of a salient cue respectively indicated where a rewarded target would appear and the monetary gain (large or small) associated with its detection. While cues that either shifted or maintained attention were presented every 4 to 8 sec, the reward magnitude indicated by the cue changed roughly every 30 sec, allowing us to distinguish a change in expected reward magnitude from a maintained state of expected reward magnitude. Posterior cingulate cortex was modulated by cues signaling an increase in expected reward magnitude, but not by cues for shifting versus maintaining spatial attention. Dorsal fronto-parietal regions in precuneus and frontal eye field (FEF) also showed increased BOLD activity for changes in expected reward magnitude from low to high, but in addition showed large independent modulations for shifting versus maintaining a...Continue Reading

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Citations

May 8, 2013·Journal of Cognitive Neuroscience·Marco CiavarroClaudio Galletti
Mar 4, 2014·PloS One·Christine GirgesJustin M D O'Brien
Apr 5, 2013·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Paolo CapotostoMaurizio Corbetta
Dec 3, 2014·Neuroscience and Biobehavioral Reviews·Lori-Ann R SacreyLonnie Zwaigenbaum
Aug 8, 2015·Social Cognitive and Affective Neuroscience·Ping WeiLiyan Ji
Jun 17, 2015·Proceedings of the National Academy of Sciences of the United States of America·Sara SpadoneMaurizio Corbetta
Sep 10, 2013·The European Journal of Neuroscience·Szabolcs KériOguz Kelemen
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Jul 31, 2019·British Journal of Psychology·Jingjing ZhaoFeng Kong
Mar 13, 2014·The European Journal of Neuroscience·Annalisa TosoniGaspare Galati
Apr 11, 2020·Experimental Brain Research·Olivier CodolPeter J Holland
Jan 14, 2017·Frontiers in Neural Circuits·MohammadMehdi KafashanBen J A Palanca

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