Spine
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Case Reports Comparative Study Clinical Trial
Axial symptoms after cervical laminoplasty with C3 laminectomy compared with conventional C3-C7 laminoplasty: a modified laminoplasty preserving the semispinalis cervicis inserted into axis.
Results of C4-C7 laminoplasty with C3 laminectomy and C3-C7 laminoplasty were compared. ⋯ This method was less invasive to the cervical posterior muscles than C3-C7 laminoplasty. This is an effective procedure for preventing postoperative axial symptoms.
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Retrospective series. ⋯ It was observed that the Lenke description for structurality of proximal thoracic curves can effectively determine which curves need fusion and which curves do not. Because there was no difference among inclusion of a nonstructural proximal thoracic curve into fusion or solely fusing the main thoracic curve in terms of outcomes, extension of fusion to T2 or T3 is unnecessary. In this patient population, the question of what the upper extent of instrumentation should be could not be answered.
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Case Reports
Anterior cervical screw extrusion leading to acute upper airway obstruction: case report.
Case report of late postoperative complication. ⋯ We report a case of acute upper airway obstruction from prevertebral abscess, likely secondary to a loosened anterior cervical screw penetrating the prevertebral soft tissue. In contrast to case reports in the literature involving instrumentation extrusion with a usually benign outcome, our case presented with a life-threatening condition.
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A biomechanical study on a pneumatically controlled 7-axis spine simulator using Delron and human cadaveric spine models. ⋯ This extension plate appears to be biomechanically equivalent to the ABC cervical plates with which it was compared in this study.
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Clinical Trial
The use of magnetic resonance imaging to evaluate lumbar muscle activity during trunk extension exercise at varying intensities.
Descriptive, repeated measures analysis of exercise-induced changes in lumbar muscle transverse relaxation time (T2). ⋯ Muscle functional MRI can be used to characterize lumbar muscle function during trunk extension exercise. The levels and recruitment patterns of the lumbar extensors, as measured by muscle T2 shifts, vary with exercise intensity. Future research is needed to assess the mechanism of the nonlinear relationship between T2 shifts and exercise intensity, and to clarify the effects of fatigue and the order of exercise presentation on the T2 response of the lumbar extensors.