Upper Extremity Muscles/ Actions

Question 1

Biceps brachii

Answer 1

Flexes forearm, supinates forearm, flexes arm

Question 2

Brachialis

Answer 2

Flexes forearm

Question 3

Triceps brachii

Answer 3

Extends forearm

Question 4

Brachioradialis

Answer 4

Flexes forearm, stabilizes elbow

Question 5

Projector teres

Answer 5

Pronates forearm, weakly flexes forearm

Question 6

Flexor carpi radialis

Answer 6

Flexes hand, abducts hand

Question 7

Palmaris longus

Answer 7

Weakly flexes hand

Question 8

Flexor carpi ulnaris

Answer 8

Flexes hand, adducts hand, stabilizes wrist

Question 9

Flexor digitorum superficialis

Answer 9

Flexes middle phalanx of each finger at proximal interphalangeal joint, flexes proximal phalanx of each finger at metacarpophalangeal joint, flexes hand

Question 10

Extensor carpi radialis

Answer 10

Extends hand, abducts hand

Question 11

Extensor digitorum

Answer 11

Extends fingers (PM), extends hand

Question 12

Extensor carpi ulnaris

Answer 12

Extends hand, adducts hand

Question 13

Abductor pollicis brevis

Answer 13

Abducts thumb at carpometacarpal joint

Question 14

Flexor pollicis brevis

Answer 14

Flexes thumb at carpometacarpal and metacarpophalangeal joint