Bois Bernard Private Hospital
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Secretariat: 03 21 79 26 36
How does my shoulder work?
The anatomy of the shoulder
The shoulder is a complex joint. it is both the most unstable and the most mobile of the human body, it allows movements in the three planes of space and constitutes a kinetic chain allowing precise guidance of the gestures of the arm. and hand.
Acromion
Humerus
Scapula
Clavicle
Joint acromio-clavicular
Joint glenoid-humeral
Biceps
Rotator cuff
4 Joints in the shoulder
The glenohumeral joint connects the arm bone (the humerus) to the glenoid bone of the scapula, it has a major role in the function of the arm.
the acromioclavicular joint connects the acromion to the lateral end of the clavicle.
the sternoclavicular joint connects the upper limb to the thorax.
the scapulo-thoracic joint, represents a sliding space between the scapula (scapula) and the thorax.
Shoulder ligaments
The ligaments of the shoulder are numerous around the glenohumeral joint. Their weakness can lead to shoulder instability.
Recurrent dislocations aggravate lesions of the inferior glenohumeral ligament, which plays a major role in shoulder stability.
The muscles and tendons
The great mobility of the shoulder is the result of the coordinated action of the five muscles of the rotator cuff: the supraspinatus, the infraspinatus, the teres minor, the subscapularis and the long portion of the biceps muscle. brachial. Each of the rotator cuff muscles is attached to the joint by a tendon.