DaVinci medical academy

No 55/2, New Avadi Road, Alagappa Nagar, Kilpauk. Chennai

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  • 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.