Development of limbic (uncinate fascicle, C), efferent (periventricular fibre system with subcallosal fascicle of Muratoff and cortico-striate fibres, D) and thalamocortical fibres (ThCx A, B) at 13 PCW revealed by Nissl (A) staining and DTI tractography (B, C, D). ThCx, Thalamo-cortical fibers.