Toggle Main Menu Toggle Search

Open Access padlockePrints

Attentional modulation of human auditory cortex

Lookup NU author(s): Professor Christopher Petkov

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

Attention powerfully influences auditory perception, but little is understood about the mechanisms whereby attention sharpens responses to unattended sounds. We used high-resolution surface mapping techniques (using functional magnetic resonance imaging, fMRI) to examine activity in human auditory cortex during an intermodal selective attention task. Stimulus-dependent activations (SDAs), evoked by unattended sounds during demanding visual tasks, were maximal over mesial auditory cortex. They were tuned to sound frequency and location, and showed rapid adaptation to repeated sounds. Attention-related modulations (ARMs) were isolated as response enhancements that occurred when subjects performed pitch-discrimination tasks. In contrast to SDAs, ARMs were localized to lateral auditory cortex, showed broad frequency and location tuning, and increased in amplitude with sound repetition. The results suggest a functional dichotomy of auditory cortical fields: stimulus-determined mesial fields that faithfully transmit acoustic information, and attentionally labile lateral fields that analyze acoustic features of behaviorally relevant sounds.


Publication metadata

Author(s): Petkov CI, Kang X, Alho K, Bertrand O, Yund EW, Woods DL

Publication type: Article

Publication status: Published

Journal: Nature Neuroscience

Year: 2004

Volume: 7

Issue: 6

Pages: 658-63

Print publication date: 01/06/2004

ISSN (print): 1097-6256

ISSN (electronic): 1546-1726

Publisher: Nature Publishing Group

URL: http://dx.doi.org/10.1038/nn1256

DOI: 10.1038/nn1256

PubMed id: 15156150


Altmetrics

Altmetrics provided by Altmetric


Actions

Find at Newcastle University icon    Link to this publication


Share