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Home Chiropractic Research Chiropractic: Efficacy, Safety and Satisfaction Effects of Side-Posture Positioning and Side-Posture Adjusting on the Lumbar Zygapophysial Joints as Evaluated by Magnetic Resonance Imaging: A Before and After Study with Randomization

Effects of Side-Posture Positioning and Side-Posture Adjusting on the Lumbar Zygapophysial Joints as Evaluated by Magnetic Resonance Imaging: A Before and After Study with Randomization

Chiropractic adjustments increase the separation (gapping) in zygapophysial joints.  A cohort of 8 female and 8 male students, aged 22 to 29 years, were enrolled in the study. The subjects underwent magnetic resonance imaging (MRI) before and after either receiving lumbar side-posture adjustment or resting in side-posture position. Measurements were taken comparing the anterior to posterior space of the z joints before and after the intervention. Three radiologists also analyzed the images.  Findings revealed that adjustments produced a greater gapping of the z joints than did side-posture positioning alone.

Cramer GD, Tuck NR Jr, Knudsen JT, Fonda SD, Schliesser JS, Fournier JT, Patel P.   J Manipulative Physiol Ther. 2000 (Jul-Aug); 23 (6): 380-394