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| Research article summary (published 30 Jan 2003): |
Spatiotemporal activation of the two visual pathways in form discrimination and spatial location: a brain mapping study.
Full Abstract
To address the question of the relationship between the two visual pathways, a ventral stream for object and form vision and a dorsal stream for spatial and motion vision, we measured the spatiotemporal activation patterns in the two pathways responding to an integrated visuospatial task to which form discrimination and spatial location were assigned simultaneously. The two cognitive components of form discrimination and spatial location were interwoven in the task; however, the fMRI data demonstrated that such a task still activated both ventral GTi/GF (the inferior temporal gyrus/the fusiform gyrus) and dorsal Ga/PCu (the angular gyrus/Precuneus), which are supposed to mediate form discrimination and spatial location, respectively. In addition, the source waveforms of the fMRI foci based on the source analysis of the fMRI-seeded dipole modeling and the moving dipole modeling indicated that in responding to the task combining simultaneously form perception and spatial location, the activity in Ga/PCu begins earlier than that in GTi/GF, but it peaks later and lasts longer.Copyright 2002 Wiley-Liss, Inc.
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Author information
Author/s: Rao, Hengyi (H); Zhou, Tiangang (T); Zhuo, Yan (Y); Fan, Silu (S); Chen, Lin (L);
Affiliation: Beijing Laboratory of Cognitive Science, School of Life Sciences, University of Science and Technology of China.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Human brain mapping (Hum Brain Mapp), published in United States. (Language: eng)
Reference: 2003-Feb; vol 18 (issue 2) : pp 79-89
Dates: Created 2003/01/08; Completed 2003/04/09; Revised 2006/11/15;
PMID: 12518288, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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