Coracobrachialis

A: flex, adduct

O: coracoid process of scapula

I: medial surface of mid humerus

N: musculocutaneous

Levator Scapula

A: unilateral - elevate, downwardly rotate, cervical lateral flexion and rotationto same side; bilateral - cervical extension

O: transverse process of C1 - C4

I: upper region of medial border of scapula, superior angle of scapula

N: dorsal scapular

Deltoid

A: anterior fibers - abduct, horizontally adduct, IR, and flex

middle fibers - abduct

posterior fibers - abduct, horizontally abduct, ER, and extend

O: lateral 1/3 of clavicle, acromion, spine of scapula

I: deltoid tuberosity

N: axillary

Trapezius

A: upper fibers - unilateral: elevate, upwardly rotate, cervical lateral flexion to the same side, cervical rotation to the opposite side bilateral: cervical extension

middle fibers: adduct

lower fibers: depress and upwardly rotate

O: external occipital protuberance, superior nuchal line of occiput, ligamentum nachae, spinous process of C7 - T12

I: lateral 1/3 of clavicle, acromion, spine of scapula

N: spinal accessory (cranial nerve XI)

A: adduct, IR, extend

O: spinous process of T7 - T12, ribs 9 - 12, thoracolumbar aponuerosis, posterior iliac crest

I: crest of the lesser tubercle of humerus

N: thoracodorsal

Teres Major

A: adduct, ER, extend

O: lower half of the lateral border of scapula, lateral side of inferior angle

I: crest of the lesser tubercle

N: lower subscapular

Rhomboid Major

A: adduct, elevate, downwardly rotate

O: spinous process of T2 - T5

I: medial border of scapula b/w inferior angle and spine

N: dorsal scapular

Rhomboid Minor

A: adduct, elevate, downwardly rotate

O: spinous process of C7 - T1

I: upper portion of medial border of scapula, across from spine of scapula

N: dorsal scapular

Serratus Anterior

A: abduct, depresses; prevents winging of the scapula

O: surfaces of upper 8 - 9 ribs

I: anterior surface of medial border of scapula

N: Long thoracic

Pectoralis Major

A: upper fibers - adduct, IR, flex, horizontally adduct

lower fibers - adduct, IR, extned

O: medial 1/3 of clavicle, sternum, ribs 1 -6

I: crest of the greater tubercle

N: medial and lateral pectoral

Pectoralis Minor

A: abduct, depress, anterior tilt of scapula

O: ribs 3 - 5

I: coracoid process of scapula

N: medial pectoral

Infraspinatus

A: adduct, extend, IR, horizontally abduct, stablilze shoulder

O: infraspinatus fossa of scapula

I: greater tubercle

N: suprascapular

Teres Minor

A: adduct, ER, extend, horizontally abduct, stabilize shoulder

O: superior half of lateral border of scapula

I: greater tubercle of humerus

N: axillary

Subscapularis

A: IR, stablize shoulder

O: subscapular fossa

I: lesser tubercle

N: upper and lower subscapular

Supraspinatous

A: abduct, stabilze shoulder

O: supraspinous fossa

I: greater tubercle

N: suprascapular