Forearm and Hand Synergists

Question 1

Elbow Flexion
(humeroulnar and humeroradial joints)

Answer 1

biceps brachii - musculocutaneous
brachialis - musculocutaneous
brachioradialis - radial
flexor carpi radialis (assists) - median
flexor carpi ulnaris (assists) - ulnar
palmaris longus (assists) - median
pronator teres (assists) - median
extensor carpi radialis longus (assists) - radial
extensor carpi radislis brevis (assists) - radial

Question 2

Elbow Extension
(humeroulnar & humeroradial joints)

Answer 2

triceps brachii (all heads) - radial
anconeus - radial

Question 3

Forearm Supination
(proximal & distal radioulnar joints)

Answer 3

biceps brachii - musculocutaneous
supinator - radial
brachioradialis (assists) - radial

Question 4

Forearm Pronation
(proximal & distal radioulnar joints)

Answer 4

pronator teres - median
pronator quadratus - median
brachioradialis (assists) - radial

Question 5

Wrist Extension
(radiocarpal joint)

Answer 5

extensor carpi radialis longus - radial
extensor carpi radialis brevis - radial
extensor carpi ulnaris - radial
extensor digitorum (assists) - radial
extensor indicis (assists) - radial

Question 6

Wrist Flexion
(radiocarpal joint)

Answer 6

flexor carpi radialis - median
flexor carpi ulnaris - ulnar
palmaris longus - median
flexor digitorum superficialis - median
flexor digitorum profundus (assists) - median & ulnar
flexor pollicis longus (assists) - median