Display Settings:

Format

Send to:

Choose Destination
We are sorry, but NCBI web applications do not support your browser and may not function properly. More information
Neurosci Biobehav Rev. 2008 Jul;32(5):1044-54. doi: 10.1016/j.neubiorev.2008.04.005. Epub 2008 Apr 26.

The corpus callosum in dichotic listening studies of hemispheric asymmetry: a review of clinical and experimental evidence.

Author information

  • 1Department of Biological and Medical Psychology, Cognitive NeuroScience Group, University of Bergen, Jonas Lies vei 91, N-5009 Bergen, Norway. rene.westerhausen@psybp.uib.no

Abstract

The dichotic listening paradigm using verbal stimulus material typically yields a right ear advantage (REA) which indicates the left-hemisphere dominance for speech processing. Although this interpretation is widely accepted, the cerebral hemispheres also interact through the corpus callosum. Moreover, the two most influential theoretical models of dichotic listening, the structural and the attentional model, both refer to the functional integrity of the corpus callosum, when explaining the REA. However, the current review of the available data reveals several aspects that can not be explained by the dichotic listening models. For example, an individual's ability to direct attention to either ear is mediated by callosal fibers. Consequently, the corpus callosum not only has to be considered as a channel for the automatic exchange of information between the cerebral hemispheres, it rather allows for a dynamic and flexible interaction in supporting both bottom-up and top-down stimulus processing. The review has also revealed how inter-individual variability in callosal fiber structure affects both bottom-up and top-down performance on the dichotic listening task.

PMID:
18499255
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk