PHTY101 Lecture Notes - Lecture 1: Glenoid Labrum, Shoulder Joint, Ligament
Document Summary
1. 7 classify the shoulder (glenohumeral) joint and identify and/or describe its: the glenohumeral joint is a multiaxial, synovial, ball and socket joint, movements, flexion and extension- transverse axis, abduction and adduction- anteroposterior axis. Provide attachment for joint capsule, ligaments and muscles. Joint capsule: very thin and lax- does(cid:374)"t (cid:272)o(cid:373)pro(cid:373)ise rom, attaches to glenoid labrum, reflected (folded) inferiorly onto medial shaft of humerus, reinforced by; Rotator cuff tendons- supraspinatus, infraspinatus, teres minor, subscapularis. Rotator cuff tendons- action: internal or external rotation, function: pull humerus head in against fossa. Glenohumeral and coracohumeral ligaments (capsular: synovial membrane, lines joint capsule, lines bony surfaces inside joint capsule which are not covered by articular cartilage, ligaments, coracoacromial: (coracoid to acromion) Does(cid:374)"t atta(cid:272)h to hu(cid:373)erus: coracohumeral: (coracoid to greater tubercle of humerus) Prevents lateral and therefore inferior dislocation of humerus: glenohumeral: (anterior glenoid rim to humerus, three bands, superior- prevents lateral and therefore inferior dislocation of humerus, limits external rotation, middle- limits external rotation.
