Fig 1. Tractography and color fractional anisotropy (FA) map of the whole corticospinal tract (CST) in a patient with congenital bilateral perisylvian syndrome (CBPS) (A, C) and a normal subject (B, D).

The tracts are color coded for laterality: yellow (right) and red (left). The white arrows indicate the presence of the superior longitudinal fasciculus (SLF).