Tuning In to Sound: Frequency-Selective Attentional Filter in Human Primary Auditory Cortex.

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Version: author
Serval ID
serval:BIB_C97ECEC4A9AE
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Tuning In to Sound: Frequency-Selective Attentional Filter in Human Primary Auditory Cortex.
Journal
Journal of Neuroscience
Author(s)
Da Costa S., van der Zwaag W., Miller L.M., Clarke S., Saenz M.
ISSN
1529-2401 (Electronic)
ISSN-L
0270-6474
Publication state
Published
Issued date
2013
Volume
33
Number
5
Pages
1858-1863
Language
english
Notes
Publication types: JOURNAL ARTICLE Publication Status: ppublish PDF type: Article
Abstract
Cocktail parties, busy streets, and other noisy environments pose a difficult challenge to the auditory system: how to focus attention on selected sounds while ignoring others? Neurons of primary auditory cortex, many of which are sharply tuned to sound frequency, could help solve this problem by filtering selected sound information based on frequency-content. To investigate whether this occurs, we used high-resolution fMRI at 7 tesla to map the fine-scale frequency-tuning (1.5 mm isotropic resolution) of primary auditory areas A1 and R in six human participants. Then, in a selective attention experiment, participants heard low (250 Hz)- and high (4000 Hz)-frequency streams of tones presented at the same time (dual-stream) and were instructed to focus attention onto one stream versus the other, switching back and forth every 30 s. Attention to low-frequency tones enhanced neural responses within low-frequency-tuned voxels relative to high, and when attention switched the pattern quickly reversed. Thus, like a radio, human primary auditory cortex is able to tune into attended frequency channels and can switch channels on demand.
Pubmed
Web of science
Open Access
Yes
Create date
01/03/2013 18:03
Last modification date
20/08/2019 15:44
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