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| Research article summary (published 30 Jan 2003): |
Separating distractor rejection and target detection in posterior parietal cortex--an event-related fMRI study of visual marking.
Full Abstract
Successful survival in a competitive world requires the employment of efficient procedures for selecting new in preference to old information. Recent behavioral studies have shown that efficient selection is dependent not only on properties of new stimuli but also on an intentional bias that we can introduce against old stimuli. Event-related analysis of functional magnetic resonance imaging data from a task involving visual search across time as well as space indicates that the superior parietal lobule is specifically involved in processes leading to the efficient segmentation of old from new items, whereas the temporoparietal junction area and the ascending limb of the right intraparietal sulcus are involved in the detection of salient new items and in response preparation. The study provides evidence for the functional segregration of brain regions within the posterior parietal lobe.
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Author information
Author/s: Pollmann, S (S); Weidner, R (R); Humphreys, G W (GW); Olivers, C N L (CN); Müller, K (K); Lohmann, G (G); Wiggins, C J (CJ); Watson, D G (DG);
Affiliation: Day Clinic of Cognitive Neurology, University of Leipzig, Liebigstrasse 22a, D-04103 Leipzig, Germany. pollmann(-atsign-)cns.mpg.de
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: NeuroImage (Neuroimage), published in United States. (Language: eng)
Reference: 2003-Feb; vol 18 (issue 2) : pp 310-23
Dates: Created 2003/02/21; Completed 2003/04/11; Revised 2006/11/15;
PMID: 12595185, 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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