Articles: low-back-pain.
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Recently, the presence of a high-intensity zone (HIZ) within the posterior annulus seen on T2-weighted MRI has aroused great interest and even controversy among many investigators, particularly on whether the HIZ was closely associated with a concordant pain response on awake discography. The study attempted to interpret the correlation between the presence of the HIZ on MRI and awake discography, as well as its characteristic pathology. Fifty two patients with low back pain without disc herniation underwent MRI and discography successively. ⋯ All 17 discs with HIZ showed painful reproduction and abnormal morphology with annular tears extending either well into or through the outer third of the annulus fibrosus. The consecutive sagittal slices through the HIZ lesion showed that a notable histologic feature of the formation of vascularized granulation tissue in the outer region of the annulus fibrosus. The current study suggests that the HIZ of the lumbar disc on MRI in the patient with low back pain could be considered as a reliable marker of painful outer anular disruption.
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Trunk stability requires muscle stiffness associated with appropriate timing and magnitude of activation of muscles. Abnormality of muscle function has been implicated as possible cause or consequence of back pain. This experimental study compared trunk muscle activation and responses to transient force perturbations in persons with and without self-reported history of low back pain. ⋯ The likelihood of muscle responses to perturbations was not significantly different between the two groups. The findings were consistent with the hypothesis that LBP subjects employed muscle activation in a quasi-static task and preactivation prior to a perturbation in an attempt to stiffen and stabilize the trunk. However, interpretation of the findings was complicated by the fact that LBP subjects generated lesser efforts, and it was not known whether this resulted from anatomical differences (e.g., muscle atrophy) or reduced motivation (e.g., pain avoidance).
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Randomized Controlled Trial
The effectiveness of high-intensity versus low-intensity back schools in an occupational setting: a pragmatic randomized controlled trial.
Randomized controlled trial. ⋯ The low-intensity back school was most effective in reducing work absence, functional disability, and kinesiophobia, and more workers in this group scored a higher perceived recovery during the 6-month follow-up.
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Randomized Controlled Trial
Relief of low back labor pain by using intracutaneous injections of sterile water: a randomized clinical trial.
To study the effectiveness of intracutaneous injections of sterile water in relieving low back pain during labor in Thai women. ⋯ The intracutaneous injections of sterile water was found to be an effective treatment against lower back pain during the first stage of labor.
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Little is known about the methodological quality of guidelines for low back pain treatment. We evaluated the methods used by the developers according to established standards. ⋯ A small number of the available guidelines for low back pain treatment achieved acceptable results for specific quality criteria. In general, the methods to develop the guidelines' therapeutic recommendations need to be more rigorous, more explicit and better explained. In addition, greater importance should be placed on the recommendations for chronic pain.