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STUDY DESIGN AND OBJECTIVES This study was conducted to depict the qualitative and quantitative changes of intervertebral rotation and translation from L1-L2 to L5-S1 during flexion, standing, and extension using dynamic lumbosacral radiographs. METHODS A radiopaque ruler was placed on the back of each subject for the normalization of translational value.(More)
BACKGROUND Finite element analysis results will show significant differences if the model used is performed under various material properties, geometries, loading modes or other conditions. This study adopted an FE model, taking into account the possible asymmetry inherently existing in the spine with respect to the sagittal plane, with a more geometrically(More)
Minimally invasive surgeries including endoscopic surgery and mini-open surgery are current trend of spine surgery, and its main advantages are shorter recovery time and cosmetic benefits, etc. However, mini-open surgery is easier and less technique demanding than endoscopic surgery. Besides, anterior spinal fusion is better than posterior spinal fusion(More)
The geometric changes of acute thoracolumbar burst fractures under extension and traction loadings were analyzed using functional radiographs. The injuries were produced in an in vitro high-speed impact model. The changes in nine geometric parameters (three angular and six linear) were analyzed from neutral posture to extension and traction positions. In(More)
STUDY DESIGN This study was conducted to depict the change patterns of intervertebral motion of the cervical spine during flexion, upright, and extension positions using dynamic radiographs. Special interest was focused on the flexion position. OBJECTIVES To find reliable criteria for judging the normal intervertebral flexibility based on a survey of the(More)
UNLABELLED The risk assessment of falls is important, but still unsatisfactory and time-consuming. Our objective was to assess quantitative ultrasound (QUS) in the risk assessment of falls. Our study was designed as epidemiological cross-sectional study occurring from March 2009 to February 2010 by community survey at a medical center. The participants were(More)
The purpose of this study was to determine how sensorimotor status and balance control would be affected by lumbar nerve root compression in older adults. The vibration sense, joint motion sense, and strength of the lower legs of healthy older adults and older patients with lumbar nerve root compression (n = 17 each group) were tested for sensorimotor(More)
The neurological injury associated with thoracolumbar burst fractures may be due to the acute trauma event or due to chronic instability. For functional diagnosis and appropriate treatment, knowledge of the altered motion patterns of burst fractures may be helpful. Thirteen human cadaveric spine specimens were impacted at high speed in axial compression,(More)
BACKGROUND The lumbar range of motion has traditionally been used to assess disability in patients with low back disorders. Controversy exists about how movement ranges in static positions or in a single straight plane is related to the functional status of the patients. The trunk circumduction, as the result of neuromuscular coordination, is the integrated(More)