Fig 3.

Tractography. CST (first 2 columns) and cerebellar peduncles (last column) were reconstructed with DTI data and the FACT algorithm from a template of healthy subjects (row A) and in patients 1 and 2 (rows B and C). The ectopic mass seen on morphologic sections corresponds to a transvers bundle that seems to be located along the CST (white arrow). No transverse fibers are seen in the normal CST at the same level (row A). SCPs (light blue tract in the last column) of both patients are thickened and more horizontal than normal and do not pass through the anterior mesencephalon. The inferior cerebellar peduncles (green tract) in patient 1 are thinned, while in both patients, the middle cerebellar peduncles (yellow tract) are displaced anteriorly in the pons.