- main blood supply to humeral head arises from anterolateral branch of anterior humeral circumflex artery;
- this vessel passes laterally to long head of biceps & forms arcuate artery;
- arcuate artery:
- coracoid process can be palpated thru anterior deltoid muscle one to two finger breadths below outer portion of clavicle;
- one finger breadth lateral to coracoid is the GHJ;
- provides a palpable guide to deltopectoral groove;
- Infraspinatus: primary external rotator of humerus;
- Posterior Deltoid
- Teres Minor
- the posterior rotator cuff is important for maintenance of necessary force couples in axial (transverse) and coronal planes.
major internal rotators are teres major, , latissimus, pect major;
- latissimus dorsi & teres major insert along medial lip of bicipital groove & pectoralis major along lateral lip and also serve as internal rotators;
- these muscles comprise larger mass than those...
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