comprehensive review muscle function

Question 1

pronator teres

Answer 1

forearm pronation

median nerve

Question 2

flexor carpi radialis

Answer 2

wrist flexion in a radial direction

median nerve

Question 3

flexor digitorum superficialis

Answer 3

median nerve

flexion of second to fifth proximal interphalangeal joint

Question 4

flexor digitorum profundus

Answer 4

flexion of distal interphalangeal joint of second and part of third digit

Question 5

flexor pollicis longus

Answer 5

flexion of distal phalanx of thumb

Question 6

pronator quadratus

Answer 6

forearm pronation (best tested with forearm fully flexed to reduce action of pronator teres)

Question 7

abductor pollicis brevis

Answer 7

thumb abduction (palmar abduction away from plane of palm)

Question 8

flexor pollicis brevis

Answer 8

thumb flexion at metacarpophalangeal joint

Question 9

opponens pollicis

Answer 9

thumb opposition

Question 10

first and second lumbricals

Answer 10

extension of the proximal interphalangeal joint of the second and third digit

Question 11

tensor fasciae latae

Answer 11

thigh abduction with the hip flexed

Question 12

gluteus medius and minimus

Answer 12

thigh abduction with the hip extended

Question 13

gluteus maximus

Answer 13

thigh extension

Question 14

iliacus

Answer 14

hip flexion

Question 15

psoas major

Answer 15

hip flexion

Question 16

quadriceps

Answer 16

knee extension

Question 17

sartorius

Answer 17

thigh abduction, flexion, and external rotation

Question 18

adductor brevis

Answer 18

thigh adduction

Question 19

adductor longus

Answer 19

thigh adduction

Question 20

adductor magnus

Answer 20

thigh adduction

Question 21

tibialis anterior

Answer 21

foot dorsiflexion

Question 22

extensor hallucis

Answer 22

first toe extension

Question 23

peroneus longus and brevis

Answer 23

foot eversion

Question 24

extensor digitorum brevis

Answer 24

toe extension at the metatarsophalangeal joint

Question 25

adductor magnus

Answer 25

thigh adduction

Question 26

semitendinosus, semimembranosus

Answer 26

knee flexion

Question 27

biceps femoris, long head

Answer 27

knee flexion

Question 28

biceps femoris, short head

Answer 28

knee flexion

Question 29

tibialis posterior

Answer 29

foot inversion

Question 30

flexor digitorum longus

Answer 30

toe flexion

Question 31

gastrocnemius

Answer 31

plantar flexion with the knee straight

Question 32

soleus

Answer 32

plantar flexion with the knee straight or bent

Question 33

flexor carpi ulnaris

Answer 33

wrist flexion in an ulnar direction

Question 34

flexor digitorum profundus

Answer 34

flexion at distal interphalangeal joint of fourth and fifth digit

Question 35

palmaris brevis

Answer 35

corrugates hypothenar skin, aiding in grasp

Question 36

abductor digiti minimi

Answer 36

abduction of the fifth digit

Question 37

flexor digiti minimi

Answer 37

flexion of metacarpophalangeal joint of the fifth digit

Question 38

opponens digiti minimi

Answer 38

opposition of fifth digit

Question 39

third and fourth lumbricals

Answer 39

extension at proximal interphalangeal joints of fourth and fifth

Question 40

dorsal interossei

Answer 40

finger abduction

Question 41

palmar interossei

Answer 41

finger adduction

Question 42

adductor pollicis

Answer 42

thumb adduction ( in plane parallel to palm)

Question 43

flexor pollicis brevis

Answer 43

thumb flexion at metacarpophalangeal joint

Question 44

triceps

Answer 44

forearm extension

Question 45

brachioradialis

Answer 45

forearm flexion in midsupination

Question 46

extensor carpi radialis longus

Answer 46

wrist extension and abduction (radial extension)

Question 47

extensor carpi radialis brevis

Answer 47

wrist extension and abduction (radial extension)

Question 48

supinator

Answer 48

forearm supination (best tested with forearm extended to reduce action of biceps brachii)

Question 49

extensor carpi ulnaris

Answer 49

wrist extension and adduction (ulnar extension)

Question 50

extensor digitorum communis

Answer 50

extension at metacarpophalangeal joints of second to fifth digits

Question 51

extensor digiti minimi

Answer 51

extension at metacarpophalangeal joint of fifth digit

Question 52

abductor pollicis longus

Answer 52

thumb abduction (radial abduction in plane of palm)

Question 53

extensor pollicis longus

Answer 53

thumb extension at interphalangeal joint

Question 54

extensor pollicis brevis

Answer 54

thumb extension at metacarpophalangeal joint

Question 55

extensor indices

Answer 55

extension at metacarpophalangeal joints of second digit