Interhemsipheric interaction between the human cerebral hemispheres is served by abundant white-matter fibres in the human corpus callosum (CC). Damage to these fibres has notable behavioural and cognitive sequelae that depend on the exact location of the fibre loss. Until now, correlations between fibre loss and neurological disorders have been limited to post-mortem studies. Here we used probabilistic diffusion magnetic resonance imaging tractography to produce a two-dimensional map of the CC in the mid-sagittal plane. We observed an antero-posterior topography of interhemispheric tracts within the CC, consistent with our current neuroanatomical understanding of post-mortem studies in human. Callosal tract to the left and right hemispheres had comparable volume. Gender, a factor that is often reported to affect CC shape and geometry, also had no effect on the volume of the tracts. Our map showed high consistency across individuals. We propose that this map might be useful in the study of the effects of damage to human CC in neurodegenerative and cognitive disorders.

Original publication

DOI

10.1111/j.1469-7580.2006.00615.x

Type

Journal article

Journal

Journal of anatomy

Publication Date

09/2006

Volume

209

Pages

311 - 320

Addresses

Oxford Centre for Functional MRI of the Brain, Department of Clinical Neurology, University of Oxford, John Radcliffe Hospital, Oxford, UK. mojtaba@fmrib.ox.ac.uk

Keywords

Corpus Callosum, Neural Pathways, Humans, Diffusion Magnetic Resonance Imaging, Sex Factors, Anisotropy, Image Processing, Computer-Assisted, Adult, Middle Aged, Female, Male