Attention to multiple objects facilitates their integration in prefrontal and parietal cortex

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Title
Attention to multiple objects facilitates their integration in prefrontal and parietal cortex
Author(s)
Yee-Joon Kim; Jeffrey J. Tsai; Jeffrey Ojemann; Preeti Verghese
Publication Date
2017-05
Journal
JOURNAL OF NEUROSCIENCE, v.37, no.19, pp.4942 - 4953
Publisher
SOC NEUROSCIENCE
Abstract
Selective attention is known to interact with perceptual organization. In visual scenes, individual objects that are distinct and discriminablemayoccur on their own, or in groups such as a stack of books. The main objective of this study is to probe the neural interaction that occurs between individual objects when attention is directed toward one or more objects. Here we record steady-state visual evoked potentials via electrocorticography to directly assess the responses to individual stimuli and to their interaction. When human participants attend to two adjacent stimuli, prefrontal and parietal cortex shows a selective enhancement of only the neural interaction between stimuli, but not the responses to individual stimuli.Whenonly one stimulus is attended, the neural response to that stimulus is selectively enhanced in prefrontal and parietal cortex. In contrast, early visual areas generally manifest responses to individual stimuli and to their interaction regardless of attentional task, although a subset of the responses is modulated similarly to prefrontal and parietal cortex. Thus, the neural representation of the visual scene as one progresses up the cortical hierarchy becomes more highly task-specific and represents either individual stimuli or their interaction, depending on the behavioral goal. Attention to multiple objects facilitates an integration of objects akin to perceptual grouping. © 2017 the authors
URI
https://pr.ibs.re.kr/handle/8788114/3710
ISSN
0270-6474
Appears in Collections:
Center for Cognition and Sociality(인지 및 사회성 연구단) > Journal Papers (저널논문)
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