Kinesiology 2236A/B Lecture Notes - Lecture 11: Sternoclavicular Joint, Acromioclavicular Joint, Glenohumeral Ligaments

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2236A/B
• Professor: Dave Humphreys

Document Summary

Ue articulation with the thorax aka shoulder. Full of complex joints: sternoclavicular, acromioclavicular, scapulothoracic, glenohumeral. Many people have shoulder problems (tendonitis/dislocations, broken collar bone) Separations: 2 joints, acromioclavicular joint of sternoclavicular joint. Usually condition which arm comes over horizontal position supraspinatus. Connects the upper limb to the axial skeleton on each side. Clavicle and scapula: clavicle attaches medially to the sternal manubrium, laterally to the acromion process of scapula. Clavicle articulate with manubrium to form the sternoclavicular joint. Only 25% of clavicles surface area in contact. Integrity of joint comes from strong ligament attachment. Only direct connection between ue and trunk. Clavicle can move freely fwd/back up and rotate. As arm moves through flexion and/or abduction the clavicle retracts, elevates and rotates posteriorly. Dangerous if posterior because subclavian vein and artery, trachea and esophagus. Anterior dislocations rarely occur as a result of direct trauma. Occurs when an anterolateral force is applied to the clavicle and the shoulder is rolled backwards.