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Related Concept Videos

Muscles of the Shoulder01:23

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The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
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Related Experiment Video

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Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
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Novel approaches to objectively assess shoulder function.

Wendy J Hurd1, Melissa M Morrow1, Emily J Miller1

  • 1Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.

Journal of Shoulder and Elbow Surgery
|March 25, 2014
PubMed
Summary

Novel technologies objectively measure upper extremity function in patients undergoing reverse shoulder arthroplasty. Objective data captured differences in limb use and reach, aiding disease assessment and recovery monitoring.

Keywords:
Shoulderarthroplastyfunction

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Area of Science:

  • Orthopedics
  • Biomedical Engineering
  • Rehabilitation Science

Background:

  • Objective measurement of upper extremity function is crucial for assessing shoulder disease and recovery.
  • Existing technologies can be repurposed to capture functional limb use in daily life and specific tasks.

Purpose of the Study:

  • To evaluate novel applications of existing technologies for objectively capturing upper extremity function.
  • To assess side-to-side differences in functional limb use and reach in patients before reverse shoulder arthroplasty.

Main Methods:

  • Triaxial accelerometers were used to measure functional limb use in the subjects' natural environment.
  • 3-dimensional motion analysis captured functional reach area during a circumduction task.
  • Paired t tests were employed for statistical analysis to compare involved and uninvolved limbs.

Main Results:

  • No significant difference in inactivity time was found between limbs.
  • The uninvolved limb showed greater mean activity and high-intensity activity compared to the involved limb.
  • The involved limb demonstrated greater low-intensity activity, and the uninvolved limb had a larger functional reach area radius.

Conclusions:

  • Novel objective methods effectively identified functional differences in patients awaiting reverse shoulder arthroplasty.
  • These techniques can be applied across various shoulder conditions to objectively assess disease impact and post-intervention recovery.
  • Objective data are valuable for clinical assessment, tracking recovery, and supporting reimbursement claims.