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Related Experiment Videos

Documenting rotation at the glenohumeral joint. A technical note

V P Kumar1, S K Satku

  • 1Department of Orthopedics, National University of Singapore.

Acta Orthopaedica Scandinavica
|August 1, 1994
PubMed
Summary

Accurate shoulder internal rotation measurement is improved by using the humerus interepicondylar line. This method avoids inaccuracies caused by distal joint issues, ensuring reliable documentation of shoulder joint mobility.

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Area of Science:

  • Orthopedics
  • Biomechanics
  • Sports Medicine

Background:

  • Current shoulder internal rotation assessment relies on thumb-to-back reach, which can be inaccurate.
  • Distal joint conditions (e.g., elbow, wrist) can falsely elevate shoulder rotation measurements.

Purpose of the Study:

  • To introduce and validate a novel, accurate method for documenting shoulder internal rotation.
  • To overcome the limitations of existing assessment techniques.

Main Methods:

  • Establishing the humerus interepicondylar line in the coronal plane as the neutral zero position.
  • Measuring internal rotation as the angle between this line and the coronal plane during inward shoulder rotation.

Main Results:

Related Experiment Videos

  • The proposed method provides an accurate angular measurement of shoulder internal rotation.
  • This technique is unaffected by the range of motion in joints distal to the shoulder.

    • Conclusions:

    • The interepicondylar line method offers a more precise and reliable assessment of shoulder internal rotation.
    • This approach enhances diagnostic accuracy and treatment monitoring for shoulder conditions.