UQ Muscle Actions

Upper trapezius

Scapular elevation, upward rotation

Middle trapezius

Scapular retraction

Lower trapezius

Scapular depression, upward rotation

Levator scapulae

Scapular elevation, downward rotation

Rhomboid major

Scapular retraction, downward rotation

Rhomboid minor

Scapular retraction, downward rotation

Serratus anterior

Scapular protraction, upward rotation

Pectoralis minor

Scapular anterior tilt, depression

Subclavius

Clavicular depression, stabilization

Deltoid

Shoulder abduction (primary), flexion, extension

Supraspinatus

Initiates shoulder abduction

Infraspinatus

Shoulder external rotation

Teres minor

Shoulder external rotation, adduction

Subscapularis

Shoulder internal rotation

Teres major

Shoulder extension, adduction, internal rotation

Pectoralis major

Shoulder flexion, adduction, internal rotation

Latissimus dorsi

Shoulder extension, adduction, internal rotation

Coracobrachialis

Shoulder flexion, adduction

Biceps brachii

Elbow flexion, forearm supination

Brachialis

Elbow flexion

Brachioradialis

Elbow flexion (neutral forearm)

Triceps brachii

Elbow extension (long head assists shoulder extension)

Anconeus

Elbow extension, joint stabilization

Pronator teres

Forearm pronation, elbow flexion

Flexor carpi radialis

Wrist flexion, radial deviation

Palmaris longus

Wrist flexion, tenses palmar fascia

Flexor carpi ulnaris

Wrist flexion, ulnar deviation

Flexor digitorum superficialis

Flexes PIP joints (digits 2-5)

Flexor digitorum profundus

Flexes DIP joints (digits 2-5)

Flexor pollicis longus

Thumb flexion

Pronator quadratus

Forearm pronation

Extensor carpi radialis longus

Wrist extension, radial deviation

Extensor carpi radialis brevis

Wrist extension

Extensor digitorum

Extends digits 2-5

Extensor digiti minimi

Extends digit 5

Extensor carpi ulnaris

Wrist extension, ulnar deviation

Supinator

Forearm supination

Abductor pollicis longus

Thumb abduction, extension

Extensor pollicis brevis

Thumb extension (MCP)

Extensor pollicis longus

Thumb extension (IP)

Extensor indicis

Extends digit 2

Abductor pollicis brevis

Thumb abduction

Flexor pollicis brevis

Thumb flexion

Opponens pollicis

Thumb opposition

Abductor digiti minimi

Abducts digit 5

Flexor digiti minimi

Flexes digit 5

Opponens digiti minimi

Opposition of digit 5

Lumbricals

Flex MCP joints, extend IP joints

Dorsal interossei

Finger abduction

Palmar interossei

Finger adduction

Adductor pollicis

Thumb adduction

Palmaris brevis

Tenses hypothenar skin