Exam 3 Muscle Actions

Question 1

keeps contralateral pelvis level during single limb stance

Answer 1

gluteus medius, gluteus minimus, tensor fascia latae

Question 2

trunk extension

Answer 2

semitendinosus, semimembranosus

Question 3

Hip flexion

Answer 3

psoas major, iliacus, *pectineus, sartorius, *adductor brevis, adductor magnus (adductor part), rectus femoris

Question 4

Hip Extension

Answer 4

gluteus maximus, adductor magnus (hamstring part), semitendinosus, semimembranosus, biceps femoris (long head)

Question 5

Hip abduction

Answer 5

sartorius, gluteus medius, gluteus minimus, tensor fascia latae

(when hip is flexed) piriformis, obturator internus, superior + inferior gemelli

Question 6

hip adduction

Answer 6

pectineus, adductor longus +brevis +magnus, gracilis

Question 7

Hip lateral rotation (ER)

Answer 7

*pectineus, sartorius, *gluteus maximus, gluteus medius (posterior), quadratus femoris, obturator externus, psoas major, iliacus

(when hip is extended) piriformis, obturator internus, superior + inferior gemelli

Question 8

Hip medial rotation (IR)

Answer 8

gluteus medius, gluteus minimus, tensor fascia latae

Question 9

Hip stabilizer

Answer 9

prirformis, obturator internus, superior + inferior gemelli, quadratus femoris, obturator externus, rectus femoris

Question 10

knee flexion

Answer 10

sartorius, gracilis, semitendinosus, semimembranosus, biceps femoris, *gastrocnemius

Question 11

knee extension

Answer 11

rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

Question 12

lateral rotation (ER)

Answer 12

(when knee is flexed) biceps femoris

Question 13

Medial rotation (IR)

Answer 13

(when knee is flexed) sartorius, gracilis, semitendinodud, semimembranosus

Question 14

unlocks knee joint

Answer 14

popliteus

Question 15

Ankle dorsiflexion

Answer 15

tibialis anterior,extensor hallucis longus, extensor digitorum longus, fibularis tertius

Question 16

Ankle plantar flexion

Answer 16

soleus, *plantaris, *flexor hallucis longus, flexor digitorum longus, tibialis posterior, *fibularis longus + brevis

(when knee is extended) gastrosnemius

Question 17

Ankle eversion

Answer 17

fibulas longus + brevis, *fibularis tertius

Question 18

ankle inversion

Answer 18

tibialis posterior +anterior

Question 19

Ankle stabilization

Answer 19

soleus

Question 20

digit/Foot flexion

Answer 20

flexor digitorum longus, flexor digitorum brevis, *quadrate plantae, flexor digiti minimi brevis (digit 5, MTP)

Question 21

digit/Foot extension

Answer 21

extensor digitorum longus, *extensor digitorum brevis (digits 2-4)

Question 22

digit/Foot abduction

Answer 22

abductor digiti minimi (digit 50, dorsal interossei (digits 2-4, MTP)

Question 23

digit/foot adduction

Answer 23

plantar interossei (digits 3-5, MTP)

Question 24

Great toe flexion

Answer 24

flexor hallucis longus, abductor hallucis, flexor hallucis brevis (PIP)

Question 25

Great toe extension

Answer 25

extensor hallucis longus, *extensor hallucis brevis 9MTP)

Question 26

Great toe abduction

Answer 26

abductor hallucis

Question 27

Great toe adduction

Answer 27

adductor hallucis

Question 28

Flex MTP, Extend IPs

Answer 28

lumbricals

Question 29

Support longitudinal arch

Answer 29

flexor digitorum longus

(medial arch) flexor hallucis longus, tibialis poterror

Question 30

support transverse arch

Answer 30

*adductor hallucis