Shifting attention within memory representations involves early visual areas.

PloS One
Jaap MunnekeJan Theeuwes

Abstract

Prior studies have shown that spatial attention modulates early visual cortex retinotopically, resulting in enhanced processing of external perceptual representations. However, it is not clear whether the same visual areas are modulated when attention is focused on, and shifted within a working memory representation. In the current fMRI study participants were asked to memorize an array containing four stimuli. After a delay, participants were presented with a verbal cue instructing them to actively maintain the location of one of the stimuli in working memory. Additionally, on a number of trials a second verbal cue instructed participants to switch attention to the location of another stimulus within the memorized representation. Results of the study showed that changes in the BOLD pattern closely followed the locus of attention within the working memory representation. A decrease in BOLD-activity (V1-V3) was observed at ROIs coding a memory location when participants switched away from this location, whereas an increase was observed when participants switched towards this location. Continuous increased activity was obtained at the memorized location when participants did not switch. This study shows that shifting attention wi...Continue Reading

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Citations

Jan 25, 2014·Journal of Cognitive Neuroscience·Bo-Cheng KuoAnna Christina Nobre
Apr 23, 2014·The European Journal of Neuroscience·Claudia PochGareth R Barnes
Apr 1, 2015·Attention, Perception & Psychophysics·Michi Matsukura, Shaun P Vecera
Jun 5, 2015·Journal of Cognitive Neuroscience·George WallisAnna Christina Nobre
Feb 14, 2020·Attention, Perception & Psychophysics·Kiki ArkesteijnArtem V Belopolsky

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