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| Research article summary (published 29 Apr 2002): |
Top-down effects can modify the initially stimulus-driven auditory organization.
Full Abstract
We recorded event-related potentials (ERPs) and magnetic fields (ERFs) of the human brain to determine whether top-down control could modulate the initial organization of sound representations in the auditory cortex. We presented identical sound stimulation and manipulated top-down processes by instructing participants to either ignore the sounds (Ignore condition), to detect pitch changes (Attend-pitch condition), or to detect violations of a repeating tone pattern (Attend-pattern condition). The ERP results obtained in the Attend-pattern condition dramatically differed from those obtained with the other two task instructions. The magnetoencephalogram (MEG) findings were fully compatible, showing that the neural populations involved in detecting pattern violations differed from those involved in detecting pitch changes. The results demonstrate a top-down effect on the sound representation maintained in auditory cortex.
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Author information
Author/s: Sussman, Elyse (E); Winkler, István (I); Huotilainen, Minna (M); Ritter, Walter (W); Näätänen, Risto (R);
Affiliation: Department of Otolaryngology, Albert Einstein College of Medicine, 1410 Pelham Parkway S, Bronx, NY 10461, USA. esussman(-atsign-)balrog.aecom.yu.edu
Grants: R01 DC04263 (Agency:United States NIDCD) ; R01 NS30029 (Agency:United States NINDS)
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.
Journal: Brain research. Cognitive brain research (Brain Res Cogn Brain Res), published in Netherlands. (Language: eng)
Reference: 2002-May; vol 13 (issue 3) : pp 393-405
Dates: Created 2002/03/28; Completed 2002/06/19; Revised 2007/11/14;
PMID: 11919003, 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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