|
Factor/anatomical
structure
|
Importance relative to
stability
|
Pathology/Abnormality
|
|
Rotator Interval Complex- including Coraco-Humeral ligament and Superior Gleno- Humeral ligament
|
Limits external rotation and inferior translation in adduction and posterior translation inflexion |
Lesion of the rotator interval
|
|
Middle glenohumeral
ligament
|
Limits external rotation and inferior translation in adduction and anterior translation in mid-abduction.
|
Bankart lesion capsular injury
|
Inferior glenohumeral ligament complex
|
Limits anterior, posterior and inferior translation in abduction
|
Bankout lesion, capsular injury
|
|
Posterior capsule
|
Limits posterior translation in the flexed, abducted and internally rotated shoulder
|
Capsular laxity or constriction
|
|
Rotator cuff
|
Centring of the humerus into the glenoid, compression
|
Tendonitis tear, neurological deficit
|
| Long head of biceps |
Restrains anterior and superior translation, stabilizes the abducted arm , proprioception. |
SLAP lesion Tendonitis Rupture
|
Negative intra-articular
pressure |
Vacuum effect |
Injury to capsule or joint
surfaces
|
| Osseous configuration |
Concavity/convex rule of glenohumeral joint congruency |
Glenoid dysplasia, fracture, Hill-sachs lesion, reverse Hill-sachs lesion, osteoarthritis.
|
|
Glenoid labrum
|
Increase depth of glenoid, creates a conforming seal with the head of the humerus, pointof attachment for ligaments and capsule |
SLAP lesion ,Bankart Lesion.
|
