Fig. 2.

Selecting occipital-callosal fiber tracts (subject S3). (A) Fiber tracts originating in seed points in the left occipital lobe. A VOI was selected in the left occipital lobe white matter. The red region in the upper image shows the VOI in a coronal slice. The three-dimensional renderings show two views of the fiber tract estimates. The cyan structure shown at the midline represents the corpus callosum. Only tracts exceeding 2 cm are shown. Fiber tracts that connect homotopic regions between the lateral and ventral surface are missing, presumably because of limitations in the methodology. (B) The subset of left occipital fibers that pass through the callosum. The Lower Left Inset (yellow box) shows the mid-sagittal plane. Blue regions indicate the pixels with at least one fiber passing through. Note that all of these occipital fibers pass through the lower half of the splenium. (Scale bar, 5 mm.)