OIA: Pectoral Girdle and Arm (Humerus)

Trapezius

O: *

I: *

A: elevates, depresses, rotates, and retracts scapula

Rhomoid Major

O: spinous processes of upper thoracic vertebrae

I: vertebral border of scapula (below spine)

A: rotates and retracts scapula

Rhomboid Minor

O: Spinous processes of lower cervical and upper thoracic vertebrae

I: vertebral border of scapula (at base of spine)

A: rotates and retracts scapula

Levator Scapulae

O: transverse processes of cervical vertebrae

I: vertebral border of scapula (above spine)

A: elevates scapula

Pectoralis minor

O: anterior surface of upper-middle ribs

I: coracoid process of scapula

A: depresses, protracts, and rotates scapula

Serratus anterior

O: outer surface of ribs 1-9

I: entire length of vertebral border of scapula

A: protracts ad rotates scapula

Pectoralis major

O: clavicle, sternum, and costal cartilages of upper ribs

I: greater tubercle of humerus

A: flexes, adducts, and medially rotates arm (GH joint)

Latissimus dorsi

O: *

I: *

A: extends, ADducts, and medially roates arm (GH joint)

Deltoid

O: clavicle, acromion process, and spine of scapula

I: deltoid tuberosity and humerus

A: ABducts, flexes and extends, medially and laterally rotates arm (GH joint)

Supraspinatus

O: supraspinous fossa of scapula

I: greater tubercle of humerus

A: ABducts arm and stabilizes Glenohumeral joint (rotator cuff)

Infraspinatus

O: infraspinous fossa of scapula

I: greater tubercle of humerus

A: laterally rotates arm and stabilizes glenohumeral joint ( rotator cuff)

Subscapularis

O: subscapular fossa of scapula

I: lesser tubercle of humerus

A: medially rotates arm and stabilizes glenohumeral joint (rotator cuff)

Teres minor

O: axillary border of scapula

I: greater tubercle of humerus

A: laterally rotates and ADducts arm and stabilizes glenohumeral joint (rotator cuff)

Teres major

O: inferior angle of scapula

I: intertubucular groove 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)