Shoulder joint

 

  SHOULDER JOINT-  

                                      

     1.Types.    it is a synovial type joint

           Variety.   ball and socket variety

    

    ( note - revision purpose only 👍)

2. Articular surface.                                                                                                                   it is formed by articulations of two bones on is humerus and scapula, the glenoid cavity of the scapula attached to the rounded head of the humerus, the rounded head of the humerus is not attached to the inferior part of the glenoid cavity so it is most dislocation part of the shoulder joint.  and it is also called the glenohumeral joint.                                                                           

3. Ligaments of the shoulder joint.

    .coraco humeral    ligament    

    . capsular ligament

    

     .transverse humeral 

     .glenoid labrum

       . Capsular ligament-                                                                                                                     this capsule surrounded the joint,medially it is attached to the c scapula at supraglenoid tubercle, laterally it attached to the anatomical neck of humerus, inferiorly it extends to the surgical neck of humerus 

     .Coraco humeral ligament- 

                                                         it extends the coracoid process of the scapula to the humerus    

          .Transverse humeral ligament- 

                                                                this ligament forms a bridge on the bicipital groove (b/w greater and lesser tubercle)

       

     .  Glenoid labrum 

                                               it covers the glenoid cavity and increases the depth of the cavity

    4.  Relations -

                   

                Superiorly    -   coracoacromial arch,supraspinatus ,deltoid 

                 Anteriorly - deltoid, subscapularis, the short head of biceps femoris, coracobrachialis

                  Inferiorly -  long head of triceps brachii, axillary nerve  

                   Posteriorly - teres minor ,infraspinatus

      and deltoid

                5.  Movement of shoulder joint

                 . Flexion    (deltoid ant.fiber ,clavicular part of pect.major ,

                 . Extension  (post.fiber of deltoid , latissimus dorsi )

                 . Abduction ( supraspinatus and deltoid and serratus anterior 

                   .Adduction (short head of biceps and long head of triceps and pectoralis major

                     

                  . Lateral rotation ( teres minor and infraspinatus)

                  . Medial rotation  (teres major pecto. major and latissimus dorsi 

            6. Nerve supply-

  

                 . Axillary nerve 

                 . Musculocutaneus nerve 

                       . Suprascapular nerve

           APPLIED - 

                                           .shoulder drop

                                                    

                  . FROZEN Shoulder - it is a pathological condition, stiffness, and pain in the shoulder due to  the fusion of two synovial membrane 

   . Trick to remember Anatomy -

                                                         look at the person standing in front of you and recognize his organs and revise 👍