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Related Experiment Video

Updated: Jun 19, 2026

Rat Model of Adhesive Capsulitis of the Shoulder
04:46

Rat Model of Adhesive Capsulitis of the Shoulder

Published on: September 28, 2018

Physiotherapy vs. capsular shift and physiotherapy in multidirectional shoulder joint instability.

Rita M Kiss1, Arpád Illyés, Jeno Kiss

  • 1Budapest University of Technology and Economics, Department of Structures, 1111 Budapest Bertalan Lajos u. 2, Hungary. kissrit@t-online.bme.hu

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology
|October 17, 2009
PubMed
Summary

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Physiotherapy alone does not restore shoulder function in multidirectional instability (MDI). Capsular shift surgery combined with physiotherapy effectively restores shoulder kinematics and muscle activity in MDI patients.

Area of Science:

  • Orthopedics
  • Sports Medicine
  • Biomechanics

Background:

  • Multidirectional instability (MDI) of the shoulder is characterized by abnormal joint laxity.
  • Understanding shoulder kinematics and muscle activation patterns is crucial for effective MDI treatment.

Purpose of the Study:

  • To compare shoulder kinematic parameters and muscle on-off patterns in MDI patients treated with physiotherapy versus capsular shift surgery with physiotherapy.
  • To evaluate treatment effects before and after intervention during arm elevation in the scapular plane.

Main Methods:

  • Kinematic analysis of shoulder complex motion (humeral elevation, scapulothoracic and glenohumeral angles, rhythms, and center of rotation displacement).
  • Electromyographic assessment of shoulder muscle activity patterns.

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Last Updated: Jun 19, 2026

Rat Model of Adhesive Capsulitis of the Shoulder
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Published on: September 28, 2018

Modified Long Head of Biceps Tendon Rerouting and Fixation as Partial Capsular Reconstruction for Massive Irreparable Rotator Cuff Tears
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  • Comparison between MDI patients (physiotherapy or surgery+physiotherapy) and healthy controls.

    • Main Results:

    • MDI patients exhibited altered scapulothoracic (ST) and glenohumeral (GH) rhythms and increased displacement between humeral and scapular centers of rotation.
    • Physiotherapy improved rotator cuff and deltoid muscle strength and neuromuscular control.
    • Capsular shift with physiotherapy normalized ST and GH rhythms and center of rotation displacement, with near-normal muscle activity duration.

    Conclusions:

    • Physiotherapy alone is insufficient to fully restore shoulder kinematics in MDI patients.
    • Capsular shift surgery followed by physiotherapy effectively restores shoulder joint mechanics, including ST and GH rhythms, center of rotation alignment, and muscle activation patterns.