Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Attentional systems in target and distractor processing: a combined ERP and fMRI study

Bledowski, Christoph, Prvulovic, David, Goebel, Rainer, Zanella, Friedhelm E. and Linden, David Edmund Johannes ORCID: https://orcid.org/0000-0002-5638-9292 2004. Attentional systems in target and distractor processing: a combined ERP and fMRI study. Neuroimage 22 (2) , pp. 530-540. 10.1016/j.neuroimage.2003.12.034

Full text not available from this repository.

Abstract

The interplay of “top-down” and “bottom-up” regulated mechanisms is of particular relevance for the rapid (re-)focusing of attention to environmental changes. The purpose of the study was to explore the differential contributions of frontoparietal attentional networks involved in top-down and stimulus-driven processing to the detection of “target” and “distractor” events in a visual three-stimulus oddball paradigm. Thirteen healthy subjects underwent separate event-related potential (ERP) and whole-brain functional magnetic resonance imaging (fMRI) measurements during the oddball task. The targets, which were difficult to detect, elicited a classical posterior P3b whereas the distractor stimuli were followed by a centro-frontal P3a ERP. The fMRI data showed activation of the temporoparietal junction (TPJ) bilaterally and right prefrontal cortex associated with both the target and distractor conditions. This network has previously been described as an attentional system that is predominantly stimulus driven and that responds to rare events. Furthermore, target processing produced bilateral perisylvian activity, which has been related to the “retrieval mode”. Processing of the distractors activated the frontal eye fields (FEFs) and bilateral superior parietal cortex, areas engaged in attention switching and voluntary allocation of attention. Additional left prefrontal activation suggested an involvement of the cortical system for working memory encoding. Our results thus demonstrate that distractor and target processing engage a common neuronal system for the detection of rare events, but also task-specific subsystems related to attention and memory processes.

Item Type: Article
Status: Published
Schools: Medicine
Psychology
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: ERP; fMRI; P300; P3a; P3b; Attention; Target detection
ISSN: 1053-8119
Last Modified: 21 Oct 2022 08:55
URI: https://orca.cardiff.ac.uk/id/eprint/34788

Citation Data

Cited 242 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item