Actions--which muscles perform them? Flashcards
Elevate scapula
1) Descending trapezius
2) Rhomboid major
3) Rhomboid minor
4) Levator scapulae
Retract scapula
1) Middle/transverse trapezius
2) Rhomboid major
3) Rhomboid minor
4) Latissimus Dorsi
Protract scapula
1) Pectoralis minor
2) Serratus anterior
Depress scapula
1) Ascending trapezius
2) Serratus anterior
3) Pectoralis minor
Upward scapular rotation
1) Ascending trapezius
2) Descending trapezius
3) serratus anterior
Downward scapula rotation
1) Pectoralis minor
2) Rhomboid major
3) Rhomboid minor
4) Levator scapulae
5) Latissimus dorsi
Extend shoulder
1) Latissimus dorsi
2) Deltoid
3) triceps brachii [posterior arm]
Adduct shoulder
1) Latissimus dorsi
2) Teres major
3) Subscapularis
Flex shoulder
1) Deltoid
2) Biceps brachii [anterior arm]
3) Coracobrachialis [anterior arm]
Abduct shoulder
1) Supraspinatus
2) Deltoid
Medially rotate humerus
1) Latissumus dorsi
2) Teres major
3) Subscapularis
Laterally rotate humerus
1) Infraspinatus
2) Teres minor
Flex elbow
1) Biceps brachii [anterior arm]
2) Brachialis [anterior arm]
3) Pronator teres [anterior forearm] WEAK
4) Palmaris longus [anterior forearm] WEAK
5) Brachioradialis [anterior forearm misfit] Weak unless hand midprone
Supination
1) Biceps brachii [anterior arm]
2) Supinator [posterior forearm]
Extend elbow
1) triceps brachii [posterior arm]
Pronation
1) Pronator teres [anterior forearm]
2) Pronator quadratus [anterior forearm]
Wrist flexion
1) Flexor carpi radialis [anterior forearm]
2) Palmaris longus [anterior forearm]
3) Flexor carpi ulnaris [anterior forearm]
4) Flexor digitorum profundus [anterior forearm] WEAK
Wrist abduction
1) Flexor carpi radialis [anterior forearm]
2) Extensor carpi radialis longus [posterior forearm]
3) Extensor carpi radialis brevis [posterior forearm]
Wrist adduction
1) Flexor carpi ulnaris [anterior forearm]
2) Extensor carpi ulnaris [anterior forearm]
Interphalangeal joint flexion
1) Flexor digitorum superficialis [anterior forearm]; PIP
2) Flexor digitorum profundus [anterior forearm]; DIP
Thumb flexion
1) Flexor pollicis longus [anterior forearm]
2) Flexor pollicis brevis [thenar]
Wrist extension
1) Extensor carpi radialis longus [posterior forearm]
2) Extensor carpi radialis brevis [posterior forearm]
3) Extensor digitorum [posterior forearm] WEAK
4) Extensor carpi ulnaris brevis [posterior forearm]
5) Abductor pollicis longus [posterior forearm] WEAK
6) Extensor pollicis brevis [posterior forearm] WEAK
7) Extensor pollicis longus [posterior forearm] WEAK
8) Extensor indicis [posterior forearm] WEAK
Metacarpophalangeal extension
1) Extensor digitorum [posterior forearm]
2) Abductor pollicis longus [posterior forearm] THUMB ONLY
3) Extensor pollicis longus [posterior forearm] THUMB ONLY
4) Extensor pollicis brevis [posterior forearm] THUMB ONLY
Interphalangeal joint extension
1) Extensor digitorum
2) Extensor pollicis longus [posterior forearm] THUMB ONLY
3) Extensor pollicis brevis [posterior forearm] THUMB ONLY
4) Lumbricals of hand
5) Dorsal interossei (2-4) only