Upper Extremity Primary Actions

Anterior Deltoid

flexion, horizontal adduction

Middle Deltoid

abduction

Posterior Deltoid

extension, horizontal abduction

Supraspinatus

abduction

Infraspinatus

external rotation

Teres Minor

external rotation

Subscapularis

internal rotation

Teres Major

extension, adduction, internal rotation

Coracobrachialis

flexion

Latissimus dorsi

extension, adduction, internal rotation

Pec major (clavicular head)

flexion, internal rotation

Pec major (sternal head)

adduction, internal rotation

Biceps brachii

flexion, supination

Triceps brachii

extension

Serratus anterior

protraction, upward rotation

Upper trapezius

scapular elevation, upward rotation

Middle trapezius

retraction

Lower trapezius

depression, upward rotation

Rhomboids

elevation, retraction

Pectoralis minor

depression, upward tilt

Levator scapulae

elevation, downward rotation

Brachialis

flexion

Brachioradialis

flexion

Pronator teres

pronation

Pronator quadratus

pronation

Anconeus

extension

Supinator

supination

radius, ulna

During pronation, the distal end of the _____ crosses over the distal end of the ______

flexor carpi radialis

flexion, radial deviation

flexor carpi ulnaris

flexion, ulnar deviation

palmaris longus

flexion

extensor carpi radialis longus

extension, radial deviation

extensor carpi radialis brevis

extension

extensor carpi ulnaris

extension, ulnar deviation

extensor digitorum

pip, dip extension

extensor indicis

pip, dip extension

extensor digit minimi

pip, dip extension

lumbricals

pip, dip extension

dorsal interossei

mcp abduction

palmar interossei

mcp adduction

abductor digit minimi

mcp abduction

flexor digit minimi

mcp flexion

opponens digit minimi

cmc opposition

extensor pollicis brevis

cmc extension, abduction, mcp extension

abductor pollicis brevis

cmc abduction

flexor pollicis brevis

cmc flexion

abductor pollicis longus

cmc extension, abduction

flexor digitorum superficialis

pip flexion

flexor digitorum profundus

dip flexion

extension pollicis brevis

cmc extension, cmc abduction

extensor pollicis longus

ip extension

adductor pollicis

cmc adduction

opponens pollicis

cmc opposition