Research article summary (published 29 Sep 2002):

Attention-dependent changes of activation and connectivity in dichotic listening.

Full Abstract

Functional studies of auditory spatial attention generally report enhanced neural responses in auditory cortical regions. However, activity in regions of the spatial attentional network as described in the visual modality is not consistently observed. Data analysis limitations due to oppositely lateralized activity depending on the side of attentional orientation and heterogeneity of paradigms makes it hard to untangle the possible causes of these various activation patterns. In the present article we present a PET study of auditory spatial attention in which we manipulated orientation of attention, attentional load, and difficulty of the task by means of the dichotic listening paradigm. Moreover, we designed a systematic, voxel-specific, method in order to deal with oppositely lateralized activity. The results show that when listeners are involved in auditory spatial attention tasks an interacting network of frontal, temporal, and parietal regions is activated. Selective orientation toward one side mostly yields activity and connectivity modulations in the hemisphere contralateral to the attended side while in divided attention activity is mostly bilateral. Taken together, our observations are consistent with the idea of a multimodal large-scale attentional network.

Author information

Author/s: Lipschutz, Brigitte (B); Kolinsky, Régine (R); Damhaut, Philippe (P); Wikler, David (D); Goldman, Serge (S);

Affiliation: Unité de Recherches en Neurosciences Cognitives, Unité TEP/Cyclotron Biomédical (Hôpital Erasme), Université Libre de Bruxelles, Belgium. blipschu(-atsign-)ulb.ac.be

Journal and publication information

Publication Type: Clinical Trial; Journal Article

Journal: NeuroImage (Neuroimage), published in United States. (Language: eng)

Reference: 2002-Oct; vol 17 (issue 2) : pp 643-56

Dates: Created 2002/10/14; Completed 2002/11/25; Revised 2006/11/15;

PMID: 12377140, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Analysis of Variance Attention - physiology Auditory Cortex - physiology Auditory Perception - physiology Brain Mapping Dichotic Listening Tests - methods Ear - physiology Echo-Planar Imaging Female

Female Functional Laterality - physiology Gyrus Cinguli - physiology Humans Male Orientation - physiology Parietal Lobe - physiology Prefrontal Cortex - physiology Psychophysiology Speech Perception - physiology

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