Glenohumeral Joint Type of Joint Ball and Socket Synovial Joint Articulating Surfaces Coracoacromial Ligament Humeral Head Articulates with the Glenoid Cavity

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Glenohumeral Joint Type of Joint Ball and Socket Synovial Joint Articulating Surfaces Coracoacromial Ligament Humeral Head Articulates with the Glenoid Cavity

This document was created by Alex Yartsev ([email protected]); if I have used your data or images and forgot to reference you, please email me. Glenohumeral joint Type of joint Ball and socket synovial joint Articulating surfaces Coracoacromial ligament Humeral head articulates with the glenoid cavity. The cavity is deepened by the glenoid labrum. About 1/3rd of the head actually sits in the cavity. Capsule Articular capsule Attaches proximally to the margins of the glenoid cavity, and distally to the anatomical neck of the humerus. Coracohumeral ligament IT HAS HOLES IN IT. One hole admits the tendon of the long head of biceps brachii, and the other communicates with the subscapular bursa. THE WEAKEST PART is the inferior part which is not reinforced by the rotator cuff muscles Ligaments Transverse humeral ligament Glenohumeral ligaments: intrinsic ligaments, three fibrous thickenings of the capsule, anteriorly Coracohumeral ligament – from the base of coracoid to Tendon of the long head of biceps the anterior aspect of the greater tubercle Transverse humeral ligament- acts as the roof over the bicipital groove Coracoacromial ligament- forms the roof over the glenohumeral joint Stability factors The joint is too shallow to be stable; stability is sacrificed to mobility The socket is deepened by the glenoid labrum The joint is stabilized mainly by muscles: supraspinatus infraspinatus teres minor subscapularis they hold the ball in the socket the coracoacromial arch and supraspinatus tendon limit superior displacement supraspinatus and teres minor limit posterior displacement subscapularis limits anterior displacement Movements Greatest freedom of movement of any joint in the body Flexion/extension, abduction/adduction, medial and lateral rotation, circumduction Assisted by the movement of the pectoral girdle (the scapula and the clavicle) Blood supply Anterior and posterior circumflex humeral arteries Branches of the suprascapular artery Nerve supply Suprascapular, axillary and lateral pectoral nerves .

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Considered a Bone of Both Shoulder Girdle and Shoulder Joint. the Shoulder Girdle Is Comprised of the Clavicle and the Scapula
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ShoulderShoulder AnatomyAnatomy www.fisiokinesiterapia.biz ShoulderShoulder ComplexComplex BoneBone AnatomyAnatomy ClavicleClavicle – Sternal end – Acromion end ScapulaScapula Acromion – Surfaces end Sternal Costal end Dorsal – Borders – Angles ShoulderShoulder ComplexComplex BoneBone AnatomyAnatomy Scapula 1. spine 2. acromion 3. superior border 4. supraspinous fossa 5. infraspinous fossa 6. medial (vertebral) border 7. lateral (axillary) border 8. inferior angle 9. superior angle 10. glenoid fossa (lateral angle) 11. coracoid process 12. superior scapular notch 13 subscapular fossa 14. supraglenoid tubercle 15. infraglenoid tubercle ShoulderShoulder ComplexComplex BoneBone AnatomyAnatomy HumerousHumerous – head – anatomical neck – greater tubercle – lesser tubercle – greater tubercle – lesser tubercle – intertubercular sulcus (AKA bicipital groove) – deltoid tuberosity ShoulderShoulder ComplexComplex BoneBone AnatomyAnatomy HumerousHumerous – Surgical Neck – Angle of Inclination 130-150 degrees – Angle of Torsion 30 degrees posteriorly ShoulderShoulder ComplexComplex ArticulationsArticulations SternoclavicularSternoclavicular JointJoint – Sternal end of clavicle with manubrium/ 1st costal cartilage – 3 degree of freedom – Articular Disk – Ligaments Capsule Anterior/Posterior Sternoclavicular Ligament Interclavicular Ligament Costoclavicular Ligament ShoulderShoulder ComplexComplex ArticulationsArticulations AcromioclavicularAcromioclavicular JointJoint – 3 degrees of freedom – Articular Disk – Ligaments Superior/Inferior
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Systematic Review Systematic Review of the Anatomic Descriptions of the Glenohumeral Ligaments: A Call for Further Quantitative Studies Jorge Chahla, M.D., Ph.D., Zachary S. Aman, B.A., Jonathan A. Godin, M.D., M.B.A., Mark E. Cinque, M.D., CAPT Matthew T. Provencher, M.D., M.C., U.S.N.R., and Robert F. LaPrade, M.D., Ph.D. Purpose: To perform a systematic review of the glenohumeral ligament anatomic attachments on the glenoid and humeral neck. Methods: A systematic review was performed according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines using the Cochrane Database of Systematic Reviews, the Cochrane Central Register of Controlled Trials, PubMed, MEDLINE, and Embase from 1980 to present. The inclusion criteria were as follows: cadaveric or clinical anatomic studies that qualitatively or quantitatively described the glenoid and humeral attachments of the glenohumeral ligaments in the English-language literature. Imaging and animal studies, editorial articles, and surveys were excluded from this study. Results: The 15 included studies analyzed a total of 983 shoulders. Only 5 studies reported quantitative measurements. The most common glenoid superior glenohumeral ligament attachment described was in the anterolateral region of the supraglenoid tubercle and was inserting on the humerus in close vicinity to the subscapularis tendon insertion. The superior labrum and lesser tuberosity were the most commonly reported middle glenohumeral ligament attachments. The inferior glenohumeral ligament was most commonly described to attach between the 2- and 4-o’clock positions of the glenoid and distally near the surgical neck of the humerus. Conclusions: There were limited quantitative data on the attachments of the glenohumeral ligaments.
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