original abstract†Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.
BACKGROUND: Although low back pain can be principally produced or increased during action, it may also be induced or enhanced in the morning after bed rest. During bed rest, tissue edema (increased water content) may occur. In this study, we measured the changes in water content in the intervertebral disc and the paravertebral muscle before and after bed rest using a magnetization transfer magnetic resonance imaging (MT-MRI) technique that permits measuring water content in tissues.
METHODS: A total of 20 student volunteers were enrolled in this study. MT-MRI evaluation was performed before and after bed rest. To measure water content in the intervertebral disc and paravertebral muscle, two MRI sequences were performed using MT pulse-off and MT pulse-on. Based on the two images obtained, the equivalent cross-relaxation rate (ECR) was calculated.
RESULTS: The ECR for intervertebral discs was significantly lower after bed rest than before bed rest (P < 0.01). The ECR for paravertebral equivalent cross-relaxation rate muscles was significantly higher after bed rest than before bed rest (P < 0.05).
CONCLUSION: We obtained results indicating that after bed rest the water content in the intervertebral disc and the paravertebral muscle was increased and decreased, respectively.
- “Hypertrophy in the cervical muscles and thoracic discs in bed rest?,” Daniel L Belavý, Tanja Miokovic, Gabriele Armbrecht, and Dieter Felsenberg, J Appl Physiol (1985), 2013.
- “Disc herniations in astronauts: What causes them, and what does it tell us about herniation on earth?,” Daniel L Belavy, Michael Adams, Helena Brisby, Barbara Cagnie, Lieven Danneels, Jeremy Fairbank, Alan R Hargens, Stefan Judex, Richard A Scheuring, Roope Sovelius, Jill Urban, Jaap H van Dieën, and Hans-Joachim Wilke, European Spine Journal, 2016.
These two articles on PainScience.com cite Matsumura 2009 as a source:
- Save Yourself from Low Back Pain! — Low back pain myths debunked and all your treatment options reviewed
- Morning Back Pain — Why is back pain worst first thing in the morning, and what can you do about it?
This page is part of the PainScience BIBLIOGRAPHY, which contains plain language summaries of thousands of scientific papers & others sources. It’s like a highly specialized blog. A few highlights:
- Effectiveness of customised foot orthoses for Achilles tendinopathy: a randomised controlled trial. Munteanu 2015 Br J Sports Med.
- A Bayesian model-averaged meta-analysis of the power pose effect with informed and default priors: the case of felt power. Gronau 2017 Comprehensive Results in Social Psychology.
- The neck and headaches. Bogduk 2014 Neurol Clin.
- Agreement of self-reported items and clinically assessed nerve root involvement (or sciatica) in a primary care setting. Konstantinou 2012 Eur Spine J.
- Effect of NSAIDs on Recovery From Acute Skeletal Muscle Injury: A Systematic Review and Meta-analysis. Morelli 2017 Am J Sports Med.