Fig 2. Color-coded FA-maps at the level of the decussation of the superior cerebellar peduncles. A, In a healthy subject, on the color-coded FA-maps the decussation of the superior cerebellar peduncles is identified as a "red dot" (arrow) at the level of the inferior colliculi of the midbrain. The decussating fibers have a transverse orientation and consequently show a "red color coding." B, In JS, the absence of the "red dot" on color-coded FA-maps within the midbrain confirms the failure of the superior cerebellar peduncles to decussate. C,D, Fiber tractography displays that, in JS, the fibers within the superior cerebellar peduncles that connect the dentate nucleus with the nucleus ruber do not cross and remain ipsilateral. Axial, coronal, and sagittal anatomic T2-weighted images are projected within the display for orientation purposes.