Muscle Origin and Insertion

pectoralis major

O: medial 1/2 of clavicle, sternum, ribs 1-6

I: greater tubercle crest

pectoralis minor

O: ribs 3-5

I: coracoid process

latissimus dorsi

O: inferior angle, last 3-4 ribs, T6-T12

I: intratubercular groove

levator scapulae

O: transverse process C1-C4

I: superior portion of medial border

rhomboid major

O: spinous process T2-T5

I: medial border of scapula (btwn spine and inferior angle)

rhomboid minor

O: spinous process C7-T1

I: upper medial border (across from spine of scap)

serratus anterior

O: external surface of upper 8/9 ribs

I: anterior surface of medial border

trapezius

O: C7-T1 and occipital bone

I: laterloa 1/3 of clavicle, acromion, spine of scap

infraspinatus

O: infraspinous fossa

I: greater tubercle

supraspinatus

O: supraspinous fossa

I: greater tubercle

teres minor

O: upper 2/3 of lateral border

I: greater tubercle

teres major

O: lower 1/3 lateral border, inferior angle

I: lesser tubercle

subscapularis

O: subscapular fossa

I: lesser tubercle

deltoids

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

I: deltoid tuberosity

biceps brachii

Short Head

O: coracoid process

Long Head

O: supraglenoid tubercle

I (all): radial/bicipital tuberosity

coracobrachialis

O: coracoid process

I: medial surface of midhumeral shaft

triceps brachii

Long Head

O: infraglenoid tubercle

Lateral Head

O: posterior surface of proximal 1/2 of humerus

Medial Head

O: posterior surface of distal 1/2 of humerus

I (all): olecranon process

brachialis

O: distal 1/2 of anterior surface of humerus

I: ulnar tuberosity and coronoid process

brachioradialis

O: proximal 2/3 of lateral supracondylar ridge of humerus

I: radial styloid process of radius

anconeus

O: lateral epicondyle

I: olecranon process & posterior proximal surface of ulna

supinators

O: lateral epicondyle of humerus, radial collateral ligament, annular ligament, & supinator crest

I: anterior lateral surface of proximal 1/3 radial shaft

pronator teres

Humeral Head

O: medial epicondyle

Ulnar Head

O: coronoid process

I (all): middle of lateral radial surface

pronator quadratus

O: medial anterior surface of distal ulna

I: lateral anterior surface of distal radius