Douglas M Gregerson

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STUDY DESIGN A blinded, randomized controlled trial was conducted. OBJECTIVE To test the hypothesis that chiropractic side-posture manipulation (adjusting) of the lumbar spine separates (gaps) the zygapophysial (Z) joints. SUMMARY OF BACKGROUND DATA Spinal adjusting is thought to gap the Z joints, yet no studies have conclusively validated this(More)
OBJECTIVE To study data concerning the pathogenesis, frequency of occurrence, clinical manifestations and associated abnormalities of spina bifida occulta (SBO) and re-evaluate the clinical importance of the lesion. DATA SOURCES International journal articles indexed through Medline, and specific related texts, the majority of which were published after(More)
OBJECTIVE The purpose of this study was to quantify lumbar zygapophyseal (Z) joint space separation (gapping) in low back pain (LBP) subjects after spinal manipulative therapy (SMT) or side-posture positioning (SPP). METHODS This was a controlled mechanisms trial with randomization and blinding. Acute LBP subjects (N = 112; four n = 28 magnetic resonance(More)
OBJECTIVES The purpose of this study was to use previously validated methods to quantify and relate 2 phenomena associated with chiropractic spinal manipulative therapy (SMT): (1) cavitation and (2) the simultaneous gapping (separation) of the lumbar zygapophyseal (Z) joint spaces. METHODS This was a randomized, controlled, mechanistic clinical trial with(More)
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