English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Hemispheric asymmetry for auditory processing in the human auditory brain stem, thalamus, and cortex

Schönwiesner, M., Krumbholz, K., Rübsamen, R., Fink, G. R., & von Cramon, D. Y. (2007). Hemispheric asymmetry for auditory processing in the human auditory brain stem, thalamus, and cortex. Cerebral Cortex, 17(2), 492-499. doi:10.1093/cercor/bhj165.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-B941-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-F83B-5
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Schönwiesner, Marc1, 2, Author              
Krumbholz, K.2, Author
Rübsamen, Rudolf2, Author
Fink, Gereon R.2, Author
von Cramon, D. Yves1, Author              
Affiliations:
1Department Cognitive Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634563              
2External Organizations, ou_persistent22              

Content

show
hide
Free keywords: auditory spatial processing; corticofugal system; FMRI; hemisphere dominance; lateralization; subcortical auditory system
 Abstract: We report evidence for a context- and not stimulus-dependent functional asymmetry in the left and right human auditory midbrain, thalamus, and cortex in response to monaural sounds. Neural activity elicited by left- and right-ear stimulation was measured simultaneously in the cochlear nuclei, inferior colliculi (ICs), medial geniculate bodies (MGBs), and auditory cortices (ACs) in 2 functional magnetic resonance imaging experiments. In experiment 1, pulsed noise was presented monaurally to either ear, or binaurally, simulating a moving sound source. In experiment 2, only monaural sounds were presented. The results show a modulation of the neural responses to monaural sounds by the presence of binaural sounds at a time scale of tens of seconds: In the absence of binaural stimulation, the left and right ICs, MGBs, and ACs responded stronger to stimulation of the contralateral ear. When blocks of binaural stimuli were interspersed in the sound sequence, the contralateral preference vanished in those structures in the right hemisphere. The resulting hemispheric asymmetry was similar to the asymmetry demonstrated for spatial sound processing. Taken together, the data demonstrate that functional asymmetries in auditory processing are modulated by context. The observed long time constant suggests that this effect results from a “top–down” mechanism.

Details

show
hide
Language(s): eng - English
 Dates: 2006-03-242007-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 345788
Other: P8168
DOI: 10.1093/cercor/bhj165
PMID: 16565292
Other: Epub 2006
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Cerebral Cortex
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 17 (2) Sequence Number: - Start / End Page: 492 - 499 Identifier: -