title: Commonalities and differences in the spatiotemporal neural dynamics associated with automatic attentional shifts induced by gaze and arrows.
abstract: Gaze and arrows automatically trigger attentional shifts. Neuroimaging studies have identified a commonality in the spatial distribution of the neural activation involved in such attentional shifts. However, it remains unknown whether these activations occur with common temporal profiles. To investigate this issue, magnetoencephalography (MEG) was used to evaluate neural activation involved in attentional shifts induced by gaze and arrows. MEG source reconstruction analyses revealed that the superior temporal sulcus and the inferior frontal gyrus were commonly activated after 200ms, in response to directional versus non-directional cues. Regression analyses further revealed that the magnitude of brain activity in these areas and in the bilateral occipital cortex was positively related to the effect of attentional shift on reaction times under both the gaze and the arrow conditions. The results also revealed that some brain regions were activated specifically in response to directional versus non-directional gaze or arrow cues at the 350-400ms time window. These results suggest that the neural mechanisms underlying attentional shifts induced by gaze and arrows share commonalities in their spatial distributions and temporal profiles, with some spatial differences at later time stages.
authors: Graduate School of Education, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan. Electronic address: uonoshota1982@gmail.com.
authors: Shota
authors: S
authors: Uono
authors: The Hakubi Project, Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan.
authors: Wataru
authors: W
authors: Sato
authors: The Hakubi Project, Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan.
authors: Takanori
authors: T
authors: Kochiyama
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D003463:Cues; D005260:Female; D005403:Fixation, Ocular; D005625:Frontal Lobe / Q000502:physiology; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D009778:Occipital Lobe / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology; D011930:Reaction Time; D013702:Temporal Lobe / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Arrow; Attention orienting; Gaze; Magnetoencephalography (MEG)