A gyral coordinate system predictive of fibre orientationsTools Cottaar, Michiel and Bastiani, Matteo and Chen, Charles and Dikranian, Krikor and Van Essen, David and Behrens, Timothy E. and Sotiropoulos, Stamatios N. and Jbabdi, Saad (2018) A gyral coordinate system predictive of fibre orientations. NeuroImage, 176 . pp. 417-430. ISSN 1095-9572
AbstractWhen axonal fibres approach or leave the cortex, their trajectories tend to closely follow the cortical convolutions. To quantify this tendency, we propose a three-dimensional coordinate system based on the gyral geometry. For every voxel in the brain, we define a “radial” axis orthogonal to nearby surfaces, a “sulcal” axis along the sulcal depth gradient that preferentially points from deep white matter to the gyral crown, and a “gyral” axis aligned with the long axis of the gyrus.
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