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Atlas Orthogonal Chiropractic

Atlas Orthogonal Chiropractic is a system of adjusting subluxations of the cervical spine by means of its uppermost vertebra (C1 AKA the “atlas”). The Atlas Orthogonal Program was developed with specificity in mind.  Dr. Roundy uses special radiographic views to determine the extent and direction of spinal misalignment.  Information from the x-rays determines how the Doctor will adjust the spinal segment.

The actual adjustment is performed with an Atlas Orthogonal Percussion Adjusting Instrument. The instrument works by percussion – a sound wave – and the bone is gently restored to its’ normal position.

Newton's Cradle  |  Tacoma & University Place Chiropractor

In the game of pool (billiards) – if you have two balls sitting side by side and a third ball strikes one of the two, the ball being struck remains still while the one not struck rolls away – this is percussion.  Another example of percussion is Newton’s Cradle, which is shown to the right.  Newton demonstrated that if you pull one ball back and release it, the balls in the mild stay put, while the ball on the end bounces away . . . the Atlas Orthogonal Percussion Adjusting Instrument works on this same principle.

In the adjusting head of the instrument, there is a solenoid that strikes a stylus.  The stylus does not move, but allows for percussion to be transmitted through the tip.  The tip is placed over the side of the 1st vertebra and the percussive force moves the vertebra in the desired direction, based on the coordinates set by the doctor.

Atlas Orthogonal Chiropractic  |  Tacoma & University Place Chiropractor

In addition to Atlas Orthogonal procedures . . .

Dr. Roundy uses special Leander flexion-traction tables for gentle adjusting procedures of the full spine.  Many times other spinal adjusting instruments are utilized, such as the Arthrostim Instrument, Impulse Instrument and the Activator Instrument.  Each person is assessed as an individual and the best procedures and protocols are employed for that particular persons needs.

We have special training in:

  • Atlas Orthogonal Chiropractic – Board Certified Since 1995
  • Pediatric Chiropractic – Fellowship
  • Extremity Chiropractic – Certified
  • Webster Technique – Certified (Pregnancy technique for optimal fetal positioning and/or breech presentation)


Here’s a short (0:13) clip showing the atlas adjustment while using fluoroscopy (motion x-ray).

Is Your Head On Straight?

Before and After x-rays  |  Tacoma & University Place Chiropractor

Above is a sample of what we do each and every day. Notice the tilt of the skull and lower neck on the “Before” picture and how tilted the 1st vertebra is. Additionally, this individual had 18+ degrees of rotation on his 2nd vertebra (C2) that reduced to 1.4-degrees immediately. He is now in a much more orthogonal (at right angles) alignment and feeling much better.

Dr. Darryl Roundy  |  Tacoma & University Place Atlas Orthogonal Chiropractor