Quiz 3

Question 1

Abductor digiti minimi

Answer 1

Lateral plantar n.

Abducts and flexes 5th digit

Question 2

Abductor hallucis

Answer 2

Medial plantar n.

Abducts and flexes 1st digit

Question 3

Adductor brevis

Answer 3

Obturator n.

Adducts thigh at hip, weak hip flexor

Question 4

Adductor hallucis

Answer 4

Deep branch of lateral plantar n.

Adducts 1st digit, maintains transverse arch of foot

Question 5

Adductor longus

Answer 5

Obturator n. (anterior division)

Adducts thigh at hip

Question 6

Adductor magnus

Answer 6

Adductor part:
obturator n.
adducts and flexes thigh

Hamstring part:
sciatic n.
extends thigh

Question 7

Articularis genus

Answer 7

femoral n.

Pulls supratellar bursa superiorly with extension of knee

Question 8

Biceps femoris

Answer 8

Long head:
Sciatic n. (tibial division, L5-S2)
Short head:
sciatic n. (common fibular division)

Flexes and laterally rotates leg, extends thigh at hip

Question 9

Dorsal interossei (4 muscles)

Answer 9

Lateral plantar n.

Abducts through 4th toes, flex metatarsophalangeal joints, and extends phalanges

Question 10

Extensor digitorum brevis and extensor hallucis brevis

Answer 10

Deep fibular n.

Aids the extensor digitorum longus in extending of 4 medial digits at the metatarsophalangeal and interphalangeal joints

Question 11

Extensor digitorum longus

Answer 11

Deep fibular n.

Extends lateral four digits and dorsiflexes foot at ankle

Question 12

Extensor hallucis longus

Answer 12

Deep fibular n.

Extends great toe, dorsiflexes foot at ankle

Question 13

Fibularis peroneus brevis

Answer 13

Superficial fibular n.

Everts foot and weakly plantarflexes foot at ankle

Question 14

Fibular peroneus longus

Answer 14

Superficial fibular n.

Everts foot and weakly plantarflexes foot at ankle

Question 15

Fibularis peroneus tertius

Answer 15

Deep fibular n.

Dorsiflexes foot at ankle and aids in eversion of foot

Question 16

Flexor digiti minimi brevis

Answer 16

Superficial branch of lateral plantar n.

Flexes proximal phalanx of 5th digit

Question 17

Flexor digitorum brevis

Answer 17

Medial plantar n.

Flexes 2nd through 5th digits

Question 18

Flexor digitorum longus

Answer 18

Tibial n.

Flexes lateral four digits and plantarflexes foot at ankle; supports longitudinal arches of foot

Question 19

Flexor hallucis brevis

Answer 19

Medial plantar n.

Flexes proximal phalanx of 1st digit

Question 20

Flexor hallucis longus

Answer 20

Tibial n.

Flexes all joints of great toe, weakly plantarflexes foot at ankle

Question 21

Gastrocnemius

Answer 21

Tibial n.

Plantarflexes foot at ankle joint, assists in flexion of knee joint, raises heel during walking

Question 22

Gluteus maximus

Answer 22

Inferior gluteal n.

Extends flexed thigh, assists in lateral rotation, and abducts thigh

Question 23

Gluteus medius

Answer 23

Superior gluteal n.

Abducts and medially rotates thigh at hips; steadies pelvis on leg when opposite leg is raised

Question 24

Gluteus minimus

Answer 24

Superior gluteal n.

Abducts and medially rotates thigh at hips; steadies pelvis on leg when opposite leg is raised

Question 25

Gracilis

Answer 25

Obturator n. Adducts thigh, flexes and medially rotates leg

Question 26

Iliacus

Answer 26

Femoral n. Flexes hip and stabilized hip joint; acts with psoas major

Question 27

Inferior gamellus

Answer 27

N. to quadratus femoris Laterally rotates extended thigh at the hip

Question 28

Lumbricals

Answer 28

Medial one: medial plantar n. Lateral three: lateral plantar n. Flexes proximal phalanges at MTP joint, extends phalanges at PIP and Dip joints

Question 29

Obturator externus

Answer 29

Obturator n. Laterally rotates thigh, stabilizes head of femur in acetabulum

Question 30

Obturator internus

Answer 30

N. to obturator internus Laterally rotates extends thigh, abducts flexed thigh at hip

Question 31

Pectineus

Answer 31

Femoral n. and sometimes obturator n. Adducts and flexes thigh at hip

Question 32

Piriformis

Answer 32

Ventral rami of L5, S1, S2 Laterally rotates extended thigh, abducts flexed thigh at hip

Question 33

Plantar interossei (3 muscles)

Answer 33

Lateral plantar n. Adduct digits (2-4) and flex metatarsophalangeal joint and extend phalanges

Question 34

Plantaris

Answer 34

Tibial n. Weakly assists gastrocnemius

Question 35

Popliteus

Answer 35

Tibial n. (L4-S1) Weakly flexes knee and unlocks it by rotating femus on fixed tibia

Question 36

Psoas major

Answer 36

Ventral rami of first four lumbar n. Acting superiorly with iliacus: flexes hip Acting inferiorly: flexes vertebral column laterally, used to balance trunk in sitting position Acting inferiorly with iliacus: flexes trunk

Question 37

Quadratus femoris

Answer 37

N. to quadratus femoris Laterally rotates thigh at hip

Question 38

Quadratus plantae

Answer 38

Lateral plantar n. Corrects for oblique pull of flexor digitorum longus tendor, thus assists in flexion of toes

Question 39

Rectus femoris (quadriceps)

Answer 39

Femoral n. Extends leg at knee joint and flexes thigh at hip joint

Question 40

Sartorius

Answer 40

Femoral n. Abducts, laterally rotates, and flexes thigh; flexes knee joint

Question 41

Semimembranosus

Answer 41

Sciatic n. (tibial division) Flexes leg, extends thigh

Question 42

Semitendinosus

Answer 42

Sciatic n. (tibial division) Flexes leg, extends thigh

Question 43

Soleus

Answer 43

Tibial n. Plantarflexes foot at ankle, stabilizes leg over foot

Question 44

Superior gamellus

Answer 44

N. to obturator internus Laterally rotates extended thigh at the hip

Question 45

Tensor fasciae latae

Answer 45

Superior gluteal n. Abducts, medially rotates, and flexes thigh at hip; helps to keep knee extended

Question 46

Tibialis anterior

Answer 46

Deep fibular n. Dorsiflexes foot at ankle and inverts foot

Question 47

Tibialis posterior

Answer 47

Tibial n. Plantarflexes foot at ankle and inverts foot

Question 48

Vastus intermedius (quadriceps)

Answer 48

Femoral n. Extends leg at knee joint

Question 49

Vastus lateralis (quadriceps)

Answer 49

Femoral n. Extends leg at knee joint

Question 50

Vastus meedialis (quadriceps)

Answer 50

Femoral n. Extends leg at knee joint