Pectoralis major
O: clavicle, sternum, costal cartilages of upper ribs
I: grester tubercle of humerus
A: flexes, adducts, medially rotates arm (GH joint)
Latissimus dorsi
A: extends, adducts, medically rotates arm (GH joint)
Deltoid
O: clavicle, acromion process, spine of scapula
I: deltoid tuberosity of humerus
A: abducts, flexes and extends, medically and laterally rotates arm (GH joint)
Supraspinatus
O: supraspinous fossa of scapula
I: greater tubercle of humerus
A: abducts arm (GH joint) ROTATOR CUFF
Infraspinatus
O: infraspinous fossa of scapula
I: greater tubercle of humerus
A: laterally rotates arm (GH joint) ROTATOR CUFF
Subscapularis
O: subscapular fossa of scapula
I: lesser tubercle of humerus
A: medially rotates arm (GH joint) ROTATOR CUFF
Teres minor
O: axillary border of scapula
I: greater tubercle of humerus
A: laterally rotates, adducts, and extends arm (GH joint) ROTATOR CUFF
Teres major
O: inferior angle of scapula
I: lesser tubercle of humerus
A: adducts, extends and medially rotates arm (GH joint)
Coracobrachialis
O: coracoid process of scapula
I: medial surface of humerus
A: flexes and adducts arm (GH joint)