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Shoulder kinesthesia after anterior glenohumeral joint dislocation
1Physical Therapy Program, University of Montana, Missoula 59812.
Physical Therapy
|February 1, 1989
Summary
Shoulder dislocations significantly impair kinesthesia, affecting joint position sense. Rehabilitation should target kinesthetic deficits to prevent reinjury.
Area of Science:
- Biomechanics
- Neuroscience
- Orthopedics
Background:
- Glenohumeral joint dislocations can lead to altered joint proprioception.
- Understanding kinesthetic deficits is crucial for effective shoulder rehabilitation.
Purpose of the Study:
- To investigate kinesthesia in healthy shoulders versus shoulders with a history of glenohumeral joint dislocation.
- To assess accuracy of angular reproduction, threshold to sensation of movement, and end-range reproduction.
Main Methods:
- Utilized a motor-driven shoulder-wheel apparatus for testing.
- Compared 10 healthy subjects with 8 subjects having a history of unilateral anterior dislocation.
- Analyzed three key kinesthetic measures: accuracy of angular reproduction, threshold to sensation of movement, and end-range reproduction.
Main Results:
- Significant differences (p < .001) in all kinesthetic tests were found between injured and uninjured shoulders.
- Post hoc analysis revealed significant differences (p < .02) between involved and uninvolved shoulders.
- No significant differences were observed among uninvolved shoulders.
Conclusions:
- Kinesthetic deficits are present following glenohumeral dislocation.
- These deficits may contribute to abnormal neuromuscular coordination and increase the risk of reinjury.
- Therapeutic activation of shoulder joint and muscle receptors is recommended for rehabilitation.