Shoulder Origin/Insertion Flashcards
Pectoralis Major upper fibers
Origin- medial half of anterior surface of clavicle
Insertion- Flat tendon 2 or 3 inches wide to lateral lip on intertubucular groove of humerus
Pectoralis Major lower fibers
Origin- anterior surface of costal cartiledges of first six ribs, and adjoining portion of sternum
Insertion- Flat tendon 2 or 3 inches wide to lateral lip of intertubular groove of humerus
sub-scapularis
Origin- entire anterior surface of subscapular fossa
Insertion- lesser tubercle of humerus
Coracobrachialis
origin- coracoid process of scapula
insertion- middle of medial border of humeral shaft
Deltoid anterior fibers
Origin- anterior lateral third of clavicle
Insertion- deltoid tuberosity on the lateral humerus
Deltoid middle fibers
origin- lateral aspect of acromion
insertion- deltoid tuberosity on lateral humerus
Deltoid posterior fibers
origin- inferior edge of of spine of scapula
insertion- deltoid tuberosity on lateral humerus
supraspinatus
origin- medial 2/3 of supraspinatus fossa
insertion- superiorly on greater tubercle of humerus
Latissimus Dorsi
origin- posterior crest of ilium, back of sacrum and spinous processes of lumbar and lower six thoracic vertebrae, slips from lower three ribs
insertion- medial side of intertubercular groove of humerus, just anterior to the insertion of the teres major
Teres Major
origin- posteriorly on inferior 1/3 of lateral border of scapula
insertion- medial lip of interbuercular groove of humerus, posterior to the insertion of the latissimus dorsi
infraspinatus
origin- medial aspect of infraspinatus fossa
insertion- posteriorly on greater tubercle of humerus
teres minor
origin- posteriorly on upper and middle aspect of lateral border of scapula
insertion- posteriorly on greater tubercle of humerus
