BROWSE

Related Scientist

CNIR's photo.

CNIR
뇌과학 이미징 연구단
more info

ITEM VIEW & DOWNLOAD

Neural representations of ensemble coding in the occipital and parietal cortices

Cited 0 time in webofscience Cited 0 time in scopus
62 Viewed 0 Downloaded
Title
Neural representations of ensemble coding in the occipital and parietal cortices
Author(s)
Kyeong-Jin Tark; Min-Suk Kang; Chong, Sang Chul; Won Mok Shim
Publication Date
2021-12-15
Journal
NeuroImage, v.245
Publisher
Academic Press Inc.
Abstract
© 2021The human visual system is able to extract summary statistics from sets of similar items, but the underlying neural mechanism remains poorly understood. Using functional magnetic resonance imaging (fMRI) and an encoding model, we examined how the neural representation of ensemble coding is constructed by manipulating the task-relevance of ensemble features. We found a gradual increase in orientation-selective responses to the mean orientation of multiple stimuli along the visual hierarchy only when these orientations were task-relevant. Such responses to the ensemble orientation were present in the extrastriate area, V3, even when the mean orientation was not task-relevant, indicating that the ensemble representation can co-exist with the task-relevant individual feature representation. Ensemble orientations were also represented in frontal regions, but those representations were robust only when each mean orientation was linked to a motor response dimension. Together, our findings suggest that the neural representation of the ensemble percept is formed by pooling signals at multiple levels of the visual processing stream.
URI
https://pr.ibs.re.kr/handle/8788114/10869
DOI
10.1016/j.neuroimage.2021.118680
ISSN
1053-8119
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse