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

Trunk muscle geometry and centroid location when twisting

Y H Tsuang1, G J Novak, O D Schipplein

  • 1Department of Orthopedic Surgery, National Taiwan University Hospital, Taipei.

Journal of Biomechanics
|April 1, 1993
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

Factors influencing the cost of chronic low back injuries: An analysis of data from independent medical examinations.

Journal of occupational rehabilitation·2013
Same author

Cushioning effect of heel cups.

Clinical biomechanics (Bristol, Avon)·2013
Same author

Failure sites and peak tensile forces of the composite triceps surae muscle by passive extension in the rabbit.

Clinical biomechanics (Bristol, Avon)·2013
Same author

Radiographic and histologic assessment of calcium sulfate in experimental animal models and clinical use as a resorbable bone-graft substitute, a bone-graft expander, and a method for local antibiotic delivery. One institution's experience.

The Journal of bone and joint surgery. American volume·2001
Same author

A multicenter, prospective, randomized trial evaluating a new hemostatic agent for spinal surgery.

Spine·2001
Same author

Effect of endplate conditions and bone mineral density on the compressive strength of the graft-endplate interface in anterior cervical spine fusion.

Spine·2001

Lumbar trunk muscles shift and change shape during twisting motions. These movements alter muscle lines of action and moment arms, especially in the abdominal oblique muscles (AOM).

Area of Science:

  • Biomechanics
  • Anatomy
  • Musculoskeletal System

Background:

  • Understanding lumbar trunk muscle function is crucial for biomechanical analysis.
  • Trunk rotation involves complex interactions between various muscles.
  • Previous studies have not fully detailed the 3D kinematic changes in these muscles during twisting.

Purpose of the Study:

  • To investigate the three-dimensional (3D) changes in lumbar trunk muscle centroids and cross-sectional areas during twisting.
  • To analyze how these changes affect muscle lines of action and moment arms.
  • To determine the specific responses of abdominal oblique muscles (AOM) to twisting.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to scan five male volunteers in neutral and twisted postures.

Related Experiment Videos

  • A CAD digitizing system analyzed muscle centroids and cross-sectional areas from L2 to S1.
  • Muscle lines of action were reconstructed in 3D and 2D local coordinate systems.

    • Main Results:

    • All muscle centroids shifted in the 3D system, altering muscle lines of action and orientation.
    • In the 2D system, four abdominal muscles showed centroid displacement, primarily within the first 25 degrees of twist.
    • Abdominal oblique muscles (AOM) significantly changed cross-sectional area, with ipsilateral AOM increasing and contralateral AOM decreasing.
    • Moment arm changes reached up to twofold, with greater displacement higher in the lumbar spine.

    Conclusions:

    • Trunk twisting significantly alters the 3D positions and orientations of lumbar trunk muscles.
    • Abdominal oblique muscles exhibit adaptive changes in cross-sectional area during twisting.
    • These kinematic and morphologic changes likely influence lumbar spine stability and injury risk.