Joint Biomechanics
A 24-year-old male presents following an anterior shoulder dislocation during a rugby tackle. After closed reduction, his surgeon discusses the static and dynamic stabilizers of the shoulder and the factors predisposing to recurrence. The patient is concerned about returning to contact sport. Regarding glenohumeral joint stability mechanisms:
Mark each as TRUE or FALSE
The glenoid provides inherently poor bony stability with only 25-30% of the humeral head contained w...
The glenohumeral ligaments (superior, middle, inferior) function as static stabilizers becoming taut...
The glenoid provides 75% containment of the humeral head similar to the hip acetabulum; the labrum h...
Dynamic stability is provided by the rotator cuff muscles compressing the humeral head into the glen...
Negative intra-articular pressure creates a "suction" effect that resists distraction of the joint; ...
Answer the questions to see explanations
Click T (True) or F (False) for each option