Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.

Although many studies have investigated the neural basis of top-down and bottom-up attention, it still requires refinement in both temporal and spatial terms. We used magnetoencephalography to investigate the spatiotemporal dynamics of high-gamma (52-100 Hz) activities during top-down and bottom-up...

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Autores principales: Yoritaka Akimoto, Akitake Kanno, Toshimune Kambara, Takayuki Nozawa, Motoaki Sugiura, Eiichi Okumura, Ryuta Kawashima
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Publicado: Public Library of Science (PLoS) 2013
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Acceso en línea:https://doaj.org/article/91e67caee20e41958cd077a094510ac8
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spelling oai:doaj.org-article:91e67caee20e41958cd077a094510ac82021-11-18T07:52:25ZSpatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.1932-620310.1371/journal.pone.0059969https://doaj.org/article/91e67caee20e41958cd077a094510ac82013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23555852/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Although many studies have investigated the neural basis of top-down and bottom-up attention, it still requires refinement in both temporal and spatial terms. We used magnetoencephalography to investigate the spatiotemporal dynamics of high-gamma (52-100 Hz) activities during top-down and bottom-up visual attentional processes, aiming to extend the findings from functional magnetic resonance imaging and event-related potential studies. Fourteen participants performed a 3-stimulus visual oddball task, in which both infrequent non-target and target stimuli were presented. We identified high-gamma event-related synchronization in the left middle frontal gyrus, the left intraparietal sulcus, the left thalamus, and the visual areas in different time windows for the target and non-target conditions. We also found elevated imaginary coherence between the left intraparietal sulcus and the right middle frontal gyrus in the high-gamma band from 300 to 400 ms in the target condition, and between the left thalamus and the left middle frontal gyrus in theta band from 150 to 450 ms. In addition, the strength of high-gamma imaginary coherence between the left middle frontal gyrus and left intraparietal sulcus, between the left middle frontal gyrus and the right middle frontal gyrus, and the high-gamma power in the left thalamus predicted inter-subject variation in target detection response time. This source-level electrophysiological evidence enriches our understanding of bi-directional attention processes: stimulus-driven bottom-up attention orientation to a salient, but irrelevant stimulus; and top-down allocation of attentional resources to stimulus evaluation.Yoritaka AkimotoAkitake KannoToshimune KambaraTakayuki NozawaMotoaki SugiuraEiichi OkumuraRyuta KawashimaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 3, p e59969 (2013)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Yoritaka Akimoto
Akitake Kanno
Toshimune Kambara
Takayuki Nozawa
Motoaki Sugiura
Eiichi Okumura
Ryuta Kawashima
Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
description Although many studies have investigated the neural basis of top-down and bottom-up attention, it still requires refinement in both temporal and spatial terms. We used magnetoencephalography to investigate the spatiotemporal dynamics of high-gamma (52-100 Hz) activities during top-down and bottom-up visual attentional processes, aiming to extend the findings from functional magnetic resonance imaging and event-related potential studies. Fourteen participants performed a 3-stimulus visual oddball task, in which both infrequent non-target and target stimuli were presented. We identified high-gamma event-related synchronization in the left middle frontal gyrus, the left intraparietal sulcus, the left thalamus, and the visual areas in different time windows for the target and non-target conditions. We also found elevated imaginary coherence between the left intraparietal sulcus and the right middle frontal gyrus in the high-gamma band from 300 to 400 ms in the target condition, and between the left thalamus and the left middle frontal gyrus in theta band from 150 to 450 ms. In addition, the strength of high-gamma imaginary coherence between the left middle frontal gyrus and left intraparietal sulcus, between the left middle frontal gyrus and the right middle frontal gyrus, and the high-gamma power in the left thalamus predicted inter-subject variation in target detection response time. This source-level electrophysiological evidence enriches our understanding of bi-directional attention processes: stimulus-driven bottom-up attention orientation to a salient, but irrelevant stimulus; and top-down allocation of attentional resources to stimulus evaluation.
format article
author Yoritaka Akimoto
Akitake Kanno
Toshimune Kambara
Takayuki Nozawa
Motoaki Sugiura
Eiichi Okumura
Ryuta Kawashima
author_facet Yoritaka Akimoto
Akitake Kanno
Toshimune Kambara
Takayuki Nozawa
Motoaki Sugiura
Eiichi Okumura
Ryuta Kawashima
author_sort Yoritaka Akimoto
title Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
title_short Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
title_full Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
title_fullStr Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
title_full_unstemmed Spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
title_sort spatiotemporal dynamics of high-gamma activities during a 3-stimulus visual oddball task.
publisher Public Library of Science (PLoS)
publishDate 2013
url https://doaj.org/article/91e67caee20e41958cd077a094510ac8
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