Intraoperative three-dimensional visualization of the pyramidal tract in a neuronavigation system (PTV) reliably predicts true position of principal motor pathways. - Coenen,V.A.; Krings,T.; Axer,H.; Weidemann,J.; Kranzlein,H.; Hans,F.J.; Thron,A.; Gilsbach,J.M.; Rohde,V. (Surg Neurol, 2003)