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Elbow flexion analysis in Bristow patients. A preliminary report
The American Journal of Sports Medicine
|September 1, 1984
Summary
The Bristow procedure for shoulder dislocation alters biceps muscle activity, but elbow flexion strength is maintained through compensatory muscle action. Intense rehabilitation is crucial for restoring normal elbow function after surgery.
Area of Science:
- Orthopedic Surgery
- Sports Medicine
- Biomechanics
Background:
- Shoulder dislocation often requires surgical intervention, such as the Bristow procedure.
- Postoperative functional recovery, particularly elbow flexion, needs thorough evaluation.
Purpose of the Study:
- To assess elbow flexion function after the Bristow procedure using dynamic electromyography (EMG) and Cybex strength testing.
- To compare muscle activation patterns and strength between operated and non-operated sides.
Main Methods:
- Dynamic electromyography (EMG) to measure muscle activity during elbow flexion.
- Cybex strength testing to quantify elbow flexion torque.
- Comparison between seven male nonathletes post-Bristow procedure and 10 healthy control subjects.
Main Results:
- EMG showed reduced dynamic activity in the short head of the biceps on the operated side.
- Increased activity was observed in the long head of the biceps and brachialis muscles post-surgery.
- Cybex testing revealed no significant difference in elbow flexion strength between the operated and normal sides.
Conclusions:
- The Bristow procedure leads to compensatory muscle action in elbow flexion, with long head biceps and brachialis activity increasing to offset reduced short head biceps function.
- Normal elbow function range is restored post-procedure.
- Intense postoperative rehabilitation is essential for developing compensatory muscle action and optimal functional recovery.