Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Anterior thoracic posture increases thoracolumbar disc loading.

Deed E Harrison1, Christopher J Colloca, Donald D Harrison

  • 1Ruby Mountain Chiropractic Center, 123 Second Street, Elko, NV, 89801, USA. cbpdcs@idealspine.com

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
|May 29, 2004
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Improved Chronic Low Back Pain, Radiographic Alignment, and Patient Reported Outcomes Following Postural Rehabilitation Protocols: A Case Series of Two Patients with 18- and 26-Months Follow-Up.

Healthcare (Basel, Switzerland)·2026
Same author

Forward Head Posture and Trunk Muscle Activation Patterns During a Rapid Leg-Raise Task in Asymptomatic Young Adults: A Cross-Sectional Study.

Journal of clinical medicine·2026
Same author

Improvement in physical and mental quality of life following reduction of lumbar spondylolisthesis using chiropractic BioPhysics<sup>®</sup> corrective spinal rehabilitation: a case series of 117 patients with lumbar anterolisthesis(es).

European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·2026
Same author

Machine learning models for predicting treatment outcomes in chronic non-specific back pain patients undergoing lumbar extension traction.

Scientific reports·2026
Same author

Long-term stability of reducing cervical kyphosis via Chiropractic Biophysics<sup>®</sup> extension traction procedures: a case series.

Journal of physical therapy science·2026
Same author

Sensitivity and Specificity of Elliptical Modeling and Sagittal Lumbar Alignment Variables in Normal vs. Acute Low Back Pain Patients: Does Pelvic Morphology Explain Group Lordotic Differences?

Healthcare (Basel, Switzerland)·2025

Anterior trunk translation significantly increases extensor muscle activity and loads on intervertebral discs (IVDs) in the lower spine. This posture, common in back pain, elevates disc stresses, particularly at L5-S1.

Area of Science:

  • Biomechanics
  • Spinal Anatomy
  • Musculoskeletal Research

Background:

  • Trunk muscular activity is the primary driver of intervertebral disc (IVD) loads without external forces.
  • The interplay between trunk posture, spine geometry, extensor muscle activity, and IVD loads remains poorly understood.

Observation:

  • Subjects translated their thorax anteriorly by an average of +101.5 mm (C7-hip axis) in an upright posture.
  • Radiographic analysis captured neutral and anteriorly translated thoracic postures.

Findings:

  • Anterior trunk translation significantly increased thoracolumbar IVD loads and stresses below T9.
  • Compressive and shear loads, and stresses, were most pronounced at the L5-S1 and L3-L4 levels.
  • Extensor muscle loads at L5-S1 increased from 147.2 N to 667.1 N, nearly doubling compressive loads on the L5-S1 disc.

Related Experiment Videos

Implications:

  • Anterior trunk translation elevates spinal loads and stresses, potentially contributing to lumbar disc pathologies.
  • This posture may exacerbate spondylolisthesis and negatively impact lumbar spine surgery outcomes.
  • Understanding these biomechanical changes is crucial for managing spinal disorders and improving surgical results.