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Probabilistic anatomo-functional parcellation of the cortex: how many regions?

Abstract : Understanding brain structure and function entails the inclusion of anatomical and functional information in a common space, in order to study how these different informations relate to each other in a population of subjects. In this paper, we revisit the parcellation model and explicitly combine anatomical features, i.e. a segmentation of the cortex into gyri, with a functional information under the form of several cortical maps, which are used to further subdivide the gyri into functionally consistent regions. A probabilistic model is introduced, and the parcellation model is estimated using a Variational Bayes approach. The number of regions in the model is validated based on cross-validation. It is found that about 250 patches of cortex can be delineated both in the left and right hemisphere based on this procedure.
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Contributor : Bertrand Thirion Connect in order to contact the contributor
Submitted on : Thursday, July 15, 2010 - 5:17:19 PM
Last modification on : Sunday, June 26, 2022 - 11:52:00 AM


  • HAL Id : inria-00502805, version 1
  • PUBMED : 18982630


Alan Tucholka, Bertrand Thirion, Matthieu Perrot, Philippe Pinel, Jean-François Mangin, et al.. Probabilistic anatomo-functional parcellation of the cortex: how many regions?. Medical image computing and computer-assisted intervention : MICCAI .. International Conference on Medical Image Computing and Computer-Assisted Intervention, 2008, 11 (Pt 2), pp.399-406. ⟨inria-00502805⟩



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