Atlas Orthogonal (AO) is the ultimate in no force precision adjusting. X-ray analysis for this technique involves measuring the misalignment to within half of a millimeter and half of a degree of rotation. AO is another upper cervical only technique, only adjusting the top vertebra to correct the entire spine.What sets AO apart from other upper cervical techniques is that it is done with unique instrument mounted to its own table. The adjustment is made by sending a focused and vectored sound impulse through a stylus that is carefully positioned on the side of the neck.Dr. Roy Sweat, founder of Atlas Orthoganal, personally taught Dr. Brooke and Dr. Dave.