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Occipital, parietal, and frontal cortices selectively maintain task-relevant features of multi-feature objects in visual working memory

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Title
Occipital, parietal, and frontal cortices selectively maintain task-relevant features of multi-feature objects in visual working memory
Author(s)
Qing Yu; Won Mok Shim
Publication Date
2017-08
Journal
NEUROIMAGE, v.157, no.2017, pp.97 - 107
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Abstract
Previous studies have shown that information held in visual working memory is represented in the occipital, parietal, and frontal cortices. However, less is known about whether the mnemonic information of multi-feature objects is modulated by task demand in the parietal and frontal regions. To address this question, we asked participants to remember either color or orientation of one of the two colored gratings for a delay. Using fMRI and an inverted encoding model, we reconstructed population-level, feature-selective responses in the occipital, parietal and frontal cortices during memory maintenance. We found that not only orientation but also color information can be maintained in higher-order parietal and frontal cortices as well as the early visual cortex when it was cued to be remembered. Conversely, neither the task-irrelevant feature of the cued object, nor any feature of the uncued object was maintained in the occipital, parietal, or frontal cortices. These results suggest a highly selective mechanism of visual working memory that maintains task-relevant features only. © 2017 Elsevier Inc
URI
https://pr.ibs.re.kr/handle/8788114/4050
ISSN
1053-8119
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > Journal Papers (저널논문)
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