The precuneus and visuospatial attention in near and far space: A transcranial magnetic stimulation study

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Title:	The precuneus and visuospatial attention in near and far space: A transcranial magnetic stimulation study
Authors:	馬杰仁;Mahayana, Indra T.;Tcheang, Lili;Chen, Chiao-Yun;Juan, Chi-Hung;Muggleton, Neil G.
Contributors:	生醫理工學院認知神經科學研究所
Keywords:	Adult;Attention;Attention - physiology;Choice Behavior;Choice Behavior - physiology;Female;Humans;Landmark task;Male;Neglect-like effect;Neurology;Orientation;Orientation - physiology;Parietal cortex;Parietal Lobe;Parietal Lobe - physiology;Photic Stimulation;Photic Stimulation - methods;Precuneus;Reaction Time;Reaction Time - physiology;Space Perception;Space Perception - physiology;TMS;Transcranial Magnetic Stimulation;Transcranial Magnetic Stimulation - methods;Visuospatial attention;Young Adult
Date:	2014-01-01
Issue Date:	2026-04-23 14:43:59 (UTC+8)
Publisher:	Elsevier Inc.;United States: Elsevier Inc
Abstract:	摘要： There is a large body of evidence for the involvement of the parietal cortex in orientation and navigation in space. This has been supplemented by investigation of the contribution of a number of subregions using transcranial magnetic stimulation. The role of the precuneus area, located in the medial plane of posterior parietal cortex (PPC), in visuospatial functions is not well understood. We investigated the contribution of this area using the landmark task. Participants were asked to make forced-choice judgments of which side of prebisected line was longer for near and far viewing conditions (70 and 180 cm, respectively). Online 10 Hz, repetitive transcranial magnetic stimulation (rTMS) was delivered for 500 ms over the right precuneus, rPPC and vertex (control), in separate blocks of trials. The rPPC stimulation was used as a positive control, having previously resulted in “neglect like” spatial bias effects in a number of studies. A no-TMS condition showed a leftward spatial bias (pseudoneglect) for near space judgments but not for far space and was used as the baseline. Precuneus stimulation resulted in rightward spatial bias from the midpoint in near space similar to the rPPC neglect-like effect. No significant effects were seen with vertex stimulation. This study shows that precuneus, like other parietal areas, is involved in visuospatial functions. Further work is required to clarify how the contribution of this area differs from other parietal regions. •We studied the effects of repetitive TMS over right precuneus using a landmark task presented in near and far space.•Precuneus-TMS produced a rightward shift of this normal bias of perceptual judgments (a “neglect-like” effect).•This pattern was consistent with the effect of stimulation of the positive control site, the right posterior parietal cortex.•This provides initial causal evidence related to the spatial attention role of precuneus.•It supports the presumption of medial and lateral parietal cortex connections. 其他題名： Brain Stimul 出版者： United States: Elsevier Inc 出版日期： 2014-09-01 出處： Brain Stimulation, 2014-09, Vol.7 (5), p.673-679 資源來源： Alma/SFX Local Collection 版權： 2014 Elsevier Inc. 版權： Elsevier Inc. 版權： Copyright © 2014 Elsevier Inc. All rights reserved. 識別號： ISSN: 1935-861X 識別號： ISSN: 1876-4754 識別號： EISSN: 1876-4754 識別號： DOI: 10.1016/j.brs.2014.06.012 識別號： PMID: 25112521
Appears in Collections:	[College of Science Institute of Cognitive Neuroscience] journal & Dissertation

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