Fig. 1.
(A) An MRI coronal scan (6.5 mm) through the upper limb representation of motor cortex. Dominant fiber orientation is indicated by the red line segments in each square of a grid placed over the white matter compartment. Squares including the internal capsule and corpus callosum are shaded. (B) Segmentation of tissue compartments and their resistivities for the MRI scan shown in (A).