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Shoulder

O,I,A's

MUSCLEORIGININSERTIONACTION
Posterior Deltoid spine of scapula Deltoid tuberosity Shoulder abduction, extension, lateral rotation, horizontal abduction
Supraspinatus Supraspinous fossa greater tubercle of humerus shoulder abduction
Pectoralis Major (Clavicular Portion) Medial 1/3 of clavicle lateral lip of bicipital groove of humerus shoulder flexion (first 60 degrees)
Pectoralis Major (Sternal Portion) Sternum, costal cartilage of first six ribs Later lip of bicipital groove Shoulder extension (first 60 degrees)*180-120
Pectoralis major All Portions Shoulder adduction, medial rotation, horizontal adduction
Latissimus Dorsi Spinous Process of T7-L5, thoracolumbar fascia, post. surface of sacrum, iliac crest, and lower three ribs Medial lip of bicipital groove Shoulder extension, adduction, medial rotation, hyperextension
Teres Major Axillar border of scapula near inferior angle Crest below lesser tubercle next to latissimus dorsi attachment Shoulder extension, adduction, medial rotatoin
Infraspinatus Infraspinous Fossa Greater tubercle Shoulder lateral rotation, horizontal abduction
Teres Minor Axillary border of scapula greater tubercle shoulder lateral rotation, horizontal abduction
Subscapularis subscapular fossa lesser tubercle shoulder medial rotation
Corachobrachialis coracoid process medial surface of humerus near midpoint stabilizes the shoulder joint
Anterior Deltoid Lateral 1/3 of clavicle Deltoid tuberosity Shoulder abduction, flexion, medial rotation, horizontal adduction
Middle Deltoid Acromion Process Deltoid tuberosity shoulder abduction
Created by: SaraBranch