Chiropractic Full Spine Exam Practice 2026 – Complete Prep Guide

Line of drive is about the direction you push the bone during an adjustment. For an innominate (IN) adjustment, the goal is to correct rotation or tilt of the pelvis, which is best addressed by a thrust that goes from back to front (posterior to anterior) and also crosses the pelvis from medial toward lateral. This combination—posterior-to-anterior with a mediolateral component—targets the rotational misalignment of the innominate. Vertical directions (inferior-to-superior or superior-to-inferior) would address height differences rather than rotation, and using the opposite mediolateral direction wouldn’t align with the typical line of drive for this adjustment. So the correct line of drive is a posterior-to-anterior thrust with a mediolateral component.