ong or parallel with the visualized AAIFL. The guidewire distal end fixation mechanism is then affixed to vertebral bone at the cephalad end of the pilot hole to provide the percutaneous tract for guiding a drill or other instrument to form the anterior TASIF bore or conduct discectomies or disc or vertebral bone augmentation. [0094] In the anterior TASIF approach, the junction of S1 and S2 is loc