Fig. 3
Diffusion tensor imaging showing an anatomical anomaly within the pons. a, e Selection of the seed regions of interest (35Â mm2) in axial T2 weighted imaging. b, f Color-coded diffusion tensor imaging showing dorsal displacement of bilateral corticospinal tracts (solid arrows), malposition of the transverse pontine fibers (asterisk), and agenesis of the medial longitudinal fasciculus (hollow arrow in the healthy control). Tractography on the right (c, g) and left (d, h) side suggested agenesis of the pontocerebellar tracts (arrow heads) in the patients compared to the healthy control. Upper row: the patient; lower row: the age and sex-matched healthy control. Ant.: Anterior side; Post.: Posterior side