Hello and welcome to this week’s edition of HealthBeat, Chiropractic OnLine Today’s Health, News and Informational Podcast.
In this week’s news: We’ll Be Looking At –
- Shear Force on the Intervertebral Disc
- And Finally, a Story about A Biomechanical Rationale for LBP
For HealthBeat, This is Dr. Todd Eglow!
Welcome to HealthBeat Podcast #518 recorded August 7, 2015.
HealthBeat is Chiropractic OnLine Today’s radio program, providing current news and commentary about Chiropractic and Health.
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And Now for some news ….
Shear Force on the Intervertebral Disc
A new study published in the European Spine Journal looked at in vivo rabbit model and was developed to investigate the effects of shear force on intervertebral disc (IVD).
After 1 and 2 months of loading, radiographic findings showed significant disc height narrowing in L4/5 discs of the animals in loading groups, and slight lumbar spondylolisthesis in some animals of Group B.
MRI showed a significant decrease in nucleus pulposus (NP) area and signal intensity from T2-weighted images. Histologically, loss of normal nucleus pulposus cells and disorganization of the architecture of the annulus occurred, and proteoglycan stain decreased.
The results of this study suggest that disc degeneration can be induced by hyper-physiological shear loading in the rabbit IVD. Long-term shear loading may result in structural disc failure inducing lumbar spondylolisthesis and progressive disc degeneration, which, however, has to be proven by further studies.
Surf to our Show Notes for Links – http://link.springer.com/article/10.1007/s00586-015-3816-2?wt_mc=alerts.TOCjournals
LBP – A Biomechanical Rationale
The journal Spine recently published a study whose goal was to determine how different patterns of multilevel disc degeneration influence the biomechanical behavior of the lumbar spine.
Because of the complex etiology of low back pain, it is often difficult to identify the specific factors that contribute to the symptoms of a particular patient. Disc degeneration is associated with the development of low back pain, but its presence is not always synonymous with symptoms.
However, studies have suggested that “patterns” of disc degeneration may provide insight into such pain generation rather than the overall presence of degenerative changes.
The results of this study showed that stresses and forces of the surrounding ligaments, facets, and pedicles at certain vertebral levels of the spine were generally lower in skipped-level disc degeneration cases than in the contiguous multilevel disc degenerations cases even when the skipped level contained more degenerated discs.
The authors of the study concluded that to their knowledge, this is the first study to illustrate the biomechanics of specific patterns of disc degeneration of the lumbar spine.
Using a multilevel disc degeneration model, this study provides insights as to why various patterns of disc degeneration throughout the lumbar spine may affect motion and soft tissue structures as well that may have bearing in the clinical pathway of pain generation.
Surf to our Show Notes for Links – http://journals.lww.com/spinejournal/Abstract/2015/08010/Low_Back_Pain__A_Biomechanical_Rationale_Based_on.6.aspx
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– Winston Churchill
For Chiropractic OnLine Today’s HealthBeat, This has been Dr. Todd Eglow.