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

Force analysis of rotator cuff muscles

R E Hughes1, K N An

  • 1Mayo Clinic/Mayo Foundation, Rochester, MN 55905, USA.

Clinical Orthopaedics and Related Research
|September 1, 1996
PubMed
Summary

This study used a biomechanical model to analyze rotator cuff forces during arm movements. Maximal forces occurred during internal and external rotation, not abduction, suggesting these movements may pose higher risks for rotator cuff injury.

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

The revitalisation of flexor tendon allografts with bone marrow stromal cells and mechanical stimulation: An <i>ex vivo</i> model revitalising flexor tendon allografts.

Bone & joint research·2017
Same author

Specimen-specific nonlinear finite element modeling to predict vertebrae fracture loads after vertebroplasty.

Spine·2014
Same author

Intra-articular decorin influences the fibrosis genetic expression profile in a rabbit model of joint contracture.

Bone & joint research·2014
Same author

Contrarian behavior in a complex adaptive system.

Physical review. E, Statistical, nonlinear, and soft matter physics·2013
Same author

Scapular inclination and inferior stability of the shoulder.

Journal of shoulder and elbow surgery·2012
Same author

A standardized method for the assessment of shoulder function.

Journal of shoulder and elbow surgery·2012

Area of Science:

  • Biomechanics
  • Orthopedics
  • Human Movement Science

Background:

  • The rotator cuff is crucial for shoulder stability and function.
  • Understanding muscle forces during various arm movements is vital for preventing injuries.
  • Previous research has primarily focused on abduction, potentially overlooking other high-risk movements.

Purpose of the Study:

  • To investigate rotator cuff muscle forces during maximal isometric exertions and static arm elevation using a 3D biomechanical model.
  • To identify which specific movements generate the highest forces on rotator cuff muscles.
  • To inform clinical practice and ergonomic recommendations for preventing rotator cuff disease.

Main Methods:

  • Development of a 3-dimensional static biomechanical model of the glenohumeral joint.
  • Determination of muscle moment arms and cross-sectional areas from cadaveric specimens.
  • Collection of maximal isometric strength data using a Cybex II dynamometer for various exertions (abduction, adduction, internal/external rotation).

Main Results:

  • Predicted posterior deltoid forces were minimal during abduction in the scapular plane.
  • Maximal rotator cuff muscle forces were predicted during internal rotation (subscapularis) and external rotation (infraspinatus, teres minor, supraspinatus).
  • Abduction may not induce the highest supraspinatus tendon loads; arm elevation analyses might underestimate rotator cuff stress.

Conclusions:

  • Internal and external rotation exertions significantly impact rotator cuff muscle forces, particularly supraspinatus and infraspinatus.
  • Ergonomic strategies should focus on reducing internal rotation loading and considering external rotation risks.
  • Patient education regarding rotator cuff injury prevention should include warnings about both arm elevation and external rotation exertions.

Related Experiment Videos