Spine
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Randomized Controlled Trial Comparative Study
Unilateral enucleation affects the laterality but not the incidence of scoliosis in pinealectomized chicken.
Randomized prospective study using an experimental scoliosis model in a pinealectomized chicken. ⋯ Unilateral visual impairment does not have a significant effect on the overall incidence and magnitude of scoliosis in the pinealectomized chicken. It does affect the laterality of the curves though, visually impaired subjects having a significantly higher likelihood of left thoracic curves, regardless of the side of blindness. It may be worthwhile to see if such an association is present in human beings as well.
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Exploratory experimental design. ⋯ Coupled movements are a natural part of cervical motion together with primary movements and follow specific patterns in subjects with no symptoms of neck disorders. Our study shows that cervical motion alters throughout life according to specific patterns but with individual variations.
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Comparative Study Controlled Clinical Trial
Head repositioning accuracy in patients with whiplash-associated disorders.
Controlled study, measuring head repositioning error (HRE) using an electrogoniometric device. ⋯ In patients with WAD, range of motion and head repositioning accuracy were reduced. However, the differences were small. Vision suppression and task type influenced HRE.
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A retrospective review of all cases of high-grade spondylolisthesis treated by 1 surgeon between the years 1991 and 2003. ⋯ These data suggest that a posterior instrumented reduction and fusion of high-grade spondylolisthesis without decompression of the neural elements can be accomplished with acceptable radiographic and clinical results.
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A C1-C2 operation by the transoral approach was simulated to study the anatomic stratification, various structures, and adjacent relationships. The anatomic parameters in relation to transoral atlantoaxial reduction plate (TARP) internal fixation were measured. ⋯ An atlantoaxial surgery through transoral approach is safe and feasible. This approach is suitable for an anterior TARP internal fixation, and the design of the internal fixation system should be based on the above anatomic data.