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• W2345871294 abstract "Neural field theory of the corticothalamic system is applied to predict and analyze the activity eigenmodes of the bihemispheric brain, focusing particularly on their spatial structure. The eigenmodes of a single brain hemisphere are found to be close analogs of spherical harmonics, which are the natural modes of the sphere. Instead of multiple eigenvalues being equal, as in the spherical case, cortical folding splits them to have distinct values. Inclusion of interhemispheric connections between homologous regions via the corpus callosum leads to further splitting that depends on symmetry or antisymmetry of activity between brain hemispheres, and the strength and sign of the interhemispheric connections. Symmetry properties of the lowest observed eigenmodes strongly constrain the interhemispheric connectivity strengths and unihemispheric mode spectra, and it is predicted that most spontaneous brain activity will be symmetric between hemispheres, consistent with observations. Comparison with the eigenmodes of an experimental anatomical connectivity matrix confirms these results, permits the relative strengths of intrahemispheric and interhemispheric connectivities to be approximately inferred from their eigenvalues, and lays the foundation for further experimental tests. The results are consistent with brain activity being in corticothalamic eigenmodes, rather than discrete “networks” and open the way to new approaches to brain analysis." @default.
• W2345871294 created "2016-06-24" @default.
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• W2345871294 date "2016-11-01" @default.
• W2345871294 modified "2023-10-02" @default.
• W2345871294 title "Eigenmodes of brain activity: Neural field theory predictions and comparison with experiment" @default.
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• W2345871294 doi "https://doi.org/10.1016/j.neuroimage.2016.04.050" @default.
• W2345871294 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27157788" @default.
• W2345871294 hasPublicationYear "2016" @default.
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