Automatic and intrinsic auditory "what" and "where" processing in humans revealed by electrical neuroimaging.

Details

Serval ID
serval:BIB_4089B1EAC828
Type
Article: article from journal or magazin.
Collection
Publications
Title
Automatic and intrinsic auditory "what" and "where" processing in humans revealed by electrical neuroimaging.
Journal
Cerebral Cortex
Author(s)
De Santis L., Clarke S., Murray M.M.
ISSN
1047-3211
Publication state
Published
Issued date
2007
Peer-reviewed
Oui
Volume
17
Number
1
Pages
9-17
Language
english
Abstract
The auditory system includes 2 parallel functional pathways-one for treating sounds' identities and another for their spatial attributes (so-called "what" and "where" pathways). We examined the spatiotemporal mechanisms along auditory "what" and "where" pathways and whether they are automatically engaged in differentially processing spatial and pitch information of identical stimuli. Electrical neuroimaging of auditory evoked potentials (i.e., statistical analyses of waveforms, field strength, topographies, and source estimations) was applied to a passive "oddball" paradigm comprising 2 varieties of blocks of trials. On "what" blocks, band-pass-filtered noises varied in pitch, independently of perceived location. On "where" blocks, the identical stimuli varied in perceived location independently of pitch. Beginning 100 ms poststimulus, the electric field topography significantly differed between conditions, indicative of the automatic recruitment of distinct intracranial generators. A distributed linear inverse solution and statistical analysis thereof revealed activations within superior temporal cortex and prefrontal cortex bilaterally that were common for both conditions, as well as regions within the right temporoparietal cortices that were selective for the "where" condition. These findings support models of automatic and intrinsic parallel processing of auditory information, such that segregated processing of spatial and pitch features may be an organizing principle of auditory function.
Keywords
Acoustic Stimulation, Adult, Auditory Pathways, Auditory Perception, Brain Mapping, Data Interpretation, Statistical, Electroencephalography, Electromagnetic Fields, Evoked Potentials, Auditory, Female, Humans, Linear Models, Male, Pitch Perception, Prefrontal Cortex, Sound Localization, Space Perception, Temporal Lobe
Pubmed
Web of science
Open Access
Yes
Create date
21/01/2008 11:23
Last modification date
08/05/2019 17:37
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