Sports Med Origin & insertion

Pectoralis Major

Origin: Medial half of the clavicle, the sternum, the upper six ribs

Insertion: Greater tubercle of the humerus

Latissimus dorsi

Origin: The lower six thoracic and the lumbar vertebrae, the sacrum, and the posterior iliac crest

Insertion: The medial intertubercular groove of the humerus

Deltoid

Origin: Lateral third of the clavicle the acromion process, and the spine of the scapula

Insertion: Deltoid tuberosity of the humerus

Supraspinatus

Origin: Supraspinatus fossa of the scapula

Insertion: Greater tubercle of the humerus

Infraspinatus

Origin: Infraspinatus fossa of the scapula

Insertion: Greater tubercle of the humerus

Subscapularis

Origin: Subscapular fossa of the scapula

Insertion: Lesser tubercle of the humerus

Teres Minor

Origin: Lateral border of the scapula

Insertion: Greater tubercle of the humerus

Trapezius

Origin: Occipital bone, the seventh cervical and all the thoracic vertebrae

Insertion: Lateral third of the clavicle, the acromion process, and the spine of the scapula

Serratus anterior

Origin: Outer surface of the first nine ribs

Insertion: Entire length of the ventral surface of the vertebral border of the scapula