Greg Kawchuk

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OBJECTIVE To determine the biomechanical characteristics of five clinically common methods of cervical spine manipulation. DESIGN Descriptive study. SETTING Human Performance Lab, University of Calgary. PARTICIPANTS Five volunteer practitioners treating symptomatic patients from their own clinical populations. INTERVENTION Five commonly used methods(More)
Spinal manipulative therapy has been widely recognized in the medical fields as a conservative treatment modality for spinal dysfunction and pain. Spinal manipulative therapy consists of an application of a thrusting force on a specific part of the spine in a well-defined direction. The magnitude of this force has been associated with positive treatment(More)
OBJECTIVE To determine the forces imparted to the cervical spine using direct sampling methods during a clinical episode of spinal manipulative therapy. DESIGN Quantitative study. SETTING Human Performance Laboratory, University of Calgary. PARTICIPANTS Two doctor/patient pairs. Patients were selected by the treating chiropractors from their existing(More)
Spinal disorders and especially back and neck pain affect more people and have greater impact on work capacity and health-care costs than any other musculoskeletal condition. One of the difficulties in reducing the burden of spinal disorders is the wide and heterogeneous range of specific diseases and non-specific musculoskeletal disorders that can involve(More)
OBJECTIVE The purpose of this study was to confirm a practitioner's perception of cavitation during spinal manipulative therapy in a clinically relevant situation using accelerometer recordings. DESIGN Experimental study. SETTING Human Performance Laboratory and Sports Medicine Center, University of Calgary. PARTICIPANTS Twenty-eight patients from a(More)
STUDY DESIGN Prospective case series. OBJECTIVE To examine the relation between improved disability and changes in abdominal and lumbar multifidus (LM) thickness using ultrasound imaging following spinal manipulative therapy (SMT) in patients with low back pain (LBP). BACKGROUND Although there is a growing body of literature demonstrating physiologic(More)
STUDY DESIGN Prospective case series. OBJECTIVE To examine spinal stiffness in patients with low back pain (LBP) receiving spinal manipulative therapy (SMT), evaluate associations between stiffness characteristics and clinical outcome, and explore a multivariate model of SMT mechanisms as related to effects on stiffness, lumbar multifidus (LM)(More)
BACKGROUND CONTEXT The lumbar facet joint capsule is innervated with nociceptors and mechanoreceptors, and is thought to play a role in low back pain as well as to function proprioceptively. PURPOSE In order to examine the facet capsule's potential proprioceptive role, relationships between intracapsular strain and relative spine position were examined.(More)
STUDY DESIGN Intrasubject controls with randomized intervention order. OBJECTIVE To quantify the immediate change in posteroanterior (PA) spinal stiffness produced by different combinations of trunk muscle contraction. SUMMARY OF BACKGROUND DATA The abdominal hollow and the abdominal brace are 2 different combinations of trunk muscle contractions that(More)
Assessment of spinal stiffness is widely used by manual therapy practitioners as a part of clinical diagnosis and treatment selection. Although studies have commonly found poor reliability of such procedures, conflicting evidence suggests that assessment of spinal stiffness may help predict response to specific treatments. The current study evaluated the(More)