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151
13 cards·by macnameddre
Deltoid (Middle Fibers)
O: Lateral aspect of acromion I: Deltoid tuberosity on lateral humerus A: Abduction of
shoulders
Deltoid (anterior fibers)
O: Anterior lateral third of clavicle I: Deltoid tuberosity on lateral humerus A: abduction,
flexion, horizontal adduction, & internal rotat
Deltoid (Posterior Fibers)
O: Inferior edge of spine of scapula I: deltoid tuberosity on lateral humerus A: Abduction,
extension, horizontal abduction, & external rota
Coracobrachialis
O: Coracoid process of scapula I: Middle of medial border of humeral shaft A: Flexion,
adduction, & horizontal adduction of shoulder
Rotator Cuff Muscles
Supraspinatus • Infraspinatus • Teres minor • Subscapularis
Supraspinatus
O: Medial 2/3 of supraspinatus fossa I: Superiorly on the greater tubercle of humerus A:
Abduction and stabilization of humeral head in glen
Infraspinatus
O: Medial aspect of infraspinatus fossa just below the spine of the scapula I: Posteriorly on
the greater tubercle of humerus A: External ro
Teres minor
O: Posteriorly on the upper and middle aspect of the lateral border of scapula I: Posteriorly
on the greater tubercle of humerus A: External
Subscapularis
O: Entire anterior surface of subscapular fossa I: Lesser tubercle of humerus A: Internal
rotation, adduction, extension of shoulder, stabil
Teres major
O: Posteriorly on the inferior third of lateral border of scapula and just superior to the
inferior angle I: Medial lip of intertubercular g
Latissimus Dorsi
O: Posterior crest of ilium, back of sacrum, & spinous processes of lumbar & lower six thoracic
vertebrae (T6-T12); slips from the lower thr
Pectoralis Major (Upper Fibers / Clavicular Head)
O: medial ½ anterior surface of clavicle I: Flat tendon 2 or 3 inches wide to the outer lip of the
intertubercular groove of humerus A: Inte
Pectoralis major (Lower Fibers / Sternal Head)
O: Anterior surfaces of the costal cartilages of the first six ribs and adjacent portion of
sternum I: Flat tendon 2 or 3 inches wide to the