Segmentation of extreme capsule streamlines. (A, C and F) Coronal reformatted MPRAGE (magnetization-prepared rapid acquisition with gradient echo) images. (E) Sagittal reformatted MPRAGE image. (B and D) Corresponding colour-coded fractional anisotropy maps: the arrows in A show the location of the temporal stem in both hemispheres. The yellow circle in B (ROI1) includes all green voxels in anterior extreme capsule/temporal stem at the level of the anterior commissure including extreme capsule streamlines. The yellow area in C (ROI2) covers the entire cross-section of the anterior temporal lobe. ROI3 (E and F) was placed in a sagittal plane barely cutting the ground of the temporal sulcus to segment cortical projection streamlines of the temporal lobe.