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Atlas Orthogonal Chiropractic

Atlas Orthogonal (AO) is a systematic way of correcting spinal misalignment through objective evidence (x-rays, leg length checks, and scanning palpation).


AO was founded by Dr. Roy Sweat in Atlanta, GA, ongoing research at the Sweat Institute for Atlas Orthogonal has allowed for continued improvement in areas of x-ray analysis, adjusting, and overall patient care. Doctors practicing AO receive specialized, post-graduate training in the structure, function and biomechanics of the upper cervical spine. This training allows the doctor to evaluate the relationship between the upper neck and the skull, calculate its misalignment and the resulting adjusting angles, and gently adjust the neck without any manipulation (no twisting, cracking, or popping) for a more balanced state.

Atlas Orthogonal Des Moines Iowa

Advanced Orthogonal Chiropractic

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Advanced Orthogonal, also abbreviated as AO or AdvO (pronounced Ad Vo), continues to build on the innovations of Dr. Roy Sweat and his upper cervical Chiropractic pioneers.  Founded by Dr. Stan Pierce, Sr. in 2001, Advanced Orthogonal utilizes the same gently adjusting tools to correct neck misalignment and continuously strives to look forward for ways to advance this already great technique. 

Advancements already made by AdvO include:

  • refined measurements of your misalignment that take into account any changes in the shape of your skull or the joints of your upper neck

  • laser assisted placement on the adjusting table

  • refined shoulder placement

  • adjusting angle corrections that take into account how your position when laying on the adjusting table differs from how you are positioned when you are seated

  • refined analysis for the location of your atlas (the top bone in your neck) for better placement of the adjusting instrument

  • and more improvements being tested now.

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