Spectral and temporal processing in human auditory cortex

Hall, D.A., Johnsrude, I.S., Haggard, M.P., Palmer, A.R., Akeroyd, M.A. and Summerfield, A.Q., 2002. Spectral and temporal processing in human auditory cortex. Cerebral Cortex, 12 (2), pp. 140-149.

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Abstract

Hierarchical processing suggests that spectrally and temporally complex stimuli will evoke more activation than do simple stimuli, particularly in non-primary auditory fields. This hypothesis was tested using two tones, a single frequency tone and a harmonic tone, that were either static or frequency modulated to create four stimuli. We interpret the location of differences in activation by drawing comparisons between fMRI and human cytoarchitectonic data, reported in the same brain space. Harmonic tones produced more activation than single tones in right Heschl's gyrus (HG) and bilaterally in the lateral supratemporal plane (STP). Activation was also greater to frequency-modulated tones than to static tones in these areas, plus in left HG and bilaterally in an anterolateral part of the STP and the superior temporal sulcus. An elevated response magnitude to both frequency-modulated tones was found in the lateral portion of the primary area, and putatively in three surrounding non-primary regions on the lateral STP (one anterior and two posterior to HG). A focal site on the posterolateral STP showed an especially high response to the frequency-modulated harmonic tone. Our data highlight the involvement of both primary and lateral non-primary auditory regions.

Item Type:	Journal article
Description:	This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Cerebral Cortex following peer review. The definitive publisher-authenticated version: HALL, D.A., JOHNSRUDE, I.S., HAGGARD, M.P., PALMER, A.R., AKEROYD, M.A. and SUMMERFIELD, A.Q., 2002. Spectral and temporal processing in human auditory cortex. Cerebral Cortex, 12 (2), pp. 140-149, is available online at: http://cercor.oxfordjournals.org/cgi/content/full/12/2/140.
Publication Title:	Cerebral Cortex
Creators:	Hall, D.A., Johnsrude, I.S., Haggard, M.P., Palmer, A.R., Akeroyd, M.A. and Summerfield, A.Q.
Publisher:	Oxford University Press
Date:	2002
Volume:	12
Number:	2
Rights:	Copyright © 2002 Oxford University Press
Divisions:	Schools > School of Social Sciences
Record created by:	EPrints Services
Date Added:	09 Oct 2015 10:46
Last Modified:	19 Oct 2015 14:36
URI:	https://irep.ntu.ac.uk/id/eprint/17957

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