Spine
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The distribution and density of nerve innervation in the lumbar dura mater after lumbar sympathectomy were assessed in wistar rats. ⋯ Sympathectomy increased the pain threshold and made the sympathectomized rats hypesthetic. A large numbers of sensory fibers innervated the lumbar dura mater via L2-L3 sympathetic nerve in rats. Sympathectomy reduced the number of these nerve fibers in the lumbar dura mater. Sympathetic nerves may play an important role for low back pain involving the lumbar dura mater.
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This study analyzed the sacroiliac articulation at the level of the second sacral vertebra (S2). Anthropometric measurements were performed on 20 cadaveric pelves to determine the optimal starting point for lag screw fixation of the sacroiliac joint at S2. ⋯ During lag screw fixation of posterior pelvic ring disruptions, aberrant screw placement may impose considerable risk to adjacent vascular, visceral, or neural structures. After anatomic reduction of the sacroiliac joint, safe and accurate screw fixation can be achieved by utilizing the starting point and insertion trajectory described in this paper.
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The measurement properties and validity of a newly developed patient questionnaire for the assessment of patients with lumbar spinal stenosis was tested in an ongoing prospective multicenter observational study of patients undergoing decompressive surgery in three teaching hospitals. ⋯ This short self-administered spinal stenosis measure is reproducible, internally consistent, valid, and highly responsive. It can be used to complement generic instruments in outcome assessment of patients with lumbar spinal stenosis.
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Review
Functional restoration. Returning patients with chronic low back pain to work--revolution or fad?
A review was performed to assess the basis for functional restoration programs in returning patients with chronic low back pain to work. ⋯ Further clinical trials based on sound methodology are needed.