SHOULDER JOINT
- It’s a unstablejoint
- It has a shallow glenoidcavity
- Dislocation is common anteriorly. This causes axillary nerve injury as a result.
- Factors preventing dislocation of shoulder joint
- Glenoid labrum-fibrocartilage
- Rotator cuff
- Coracoacromian arch
- Rotator cuff (Musculotendinous cuff):
- Fibrous sheath formed by the four flattened tendons of Subscapularis, Infraspinatus, Teres minor and Supraspinatus (SITS)
- Gives strength to the capsule of shoulder joint all around except inferiorly
- I.m. injections in the deltoid should be given in the lower half of the muscle to avoid injury to axillary nerve.
