leg muscles

Question 1

Gemellus Inferior

Answer 1

Laterally rotates and stabilizes thigh

Question 2

piriformis

Answer 2

laterally rotates and stabilizes thigh

Question 3

gluteus minimus

Answer 3

abducts and medially rotates thigh. tilts pelvis on walking

Question 4

gluteus medius

Answer 4

abducts and medially rotates thigh

Question 5

quadratus femoris

Answer 5

laterally rotates and stabilizes hip

Question 6

gluteus maximus

Answer 6

extends and laterally rotates hip, aids in knee extension via iliotibial tract

Question 7

tensor fascia lata

Answer 7

maintains knee extended (assists gluteus maximus) and abducts thigh

Question 8

Obturator internus

Answer 8

rotates the thight laterally. extends and abducts the flexed thigh

Question 9

Obturator externus

Answer 9

rotates the thigh laterally

Question 10

Biceps femoris

Answer 10

flexes the leg and then rotates it laterally. long head extends the thigh and rotates it laterally

Question 11

Semitendinosus

Answer 11

extends the thigh. flexes and rotates the leg medially

Question 12

semimembraneous

Answer 12

extends the thigh. flexes and rotates the thigh medially.

Question 13

rectus femoris

Answer 13

extends the leg and flexes the thigh

Question 14

vastus lateralis

Answer 14

extends the leg

Question 15

vastus medialis

Answer 15

extends the leg

Question 16

vastus intermedius

Answer 16

extends the leg

Question 17

sartorius

Answer 17

flexes the thigh and rotates it laterally. flexes and medially rotates the leg

Question 18

pectineus

Answer 18

adducts, flexes and rotates the thigh medially

Question 19

gracilis

Answer 19

adducts the thigh, flexes the leg, and rotates the leg medially

Question 20

adductor longus

Answer 20

adducts the thigh, flexes and roates the thigh medially

Question 21

adductor brevis

Answer 21

adducts, flexes and rotates the thigh medially

Question 22

adductor magnus

Answer 22

powerful adductor of the thigh. superior half rotates the thigh medially and flexes it. the inferior half extends the thigh and rotates it laterally

Question 23

What arteries are involved in the cruciate anastomosis?

Answer 23

inferior gluteal artery
lateral circumflex femoral artery (transverse branch of)
medial circumflex femoral artery (transverse branch of)
first perforating artery from profunda femoris (ascending branch of)

Question 24

Extensor digitorum longus

Answer 24

extends lateral four digits and dorsiflexes foot at ankle

Question 25

Extensor halluces longus

Answer 25

Extends great toe, dorsiflexes foot at ankle

Question 26

Fibularis peroneus tertius

Answer 26

dorsiflexes foot at ankle and everts foot

Question 27

Tibialis anterior

Answer 27

dorsiflexes foot at ankle and inverts foot

Question 28

Articularis genus

Answer 28

pulls supratellar bursa superiorly with extension of knee

Question 29

extensor digitorum brevis and extensor hallucis brevis

Answer 29

aids the extensor digitorum longus in extending 4 medial digits

Question 30

iliacus

Answer 30

flexes thigh at hips and stabilizes hip joints, acts with psoas major

Question 31

Psoas

Answer 31

flexes hip, flexes vertebral column, balances trunk while in sitting position, etc

Question 32

rectus femoris

Answer 32

extends leg at knee joint and flexes thigh at hip joint

Question 33

abductor digiti minimi

Answer 33

abducts and flexes 5th digit

Question 34

abductor hallucis

Answer 34

abducts and flexes 1st digit

Question 35

dorsal interossei

Answer 35

adbcust 2nd through 4th toes, flex metatarsophangeal joints, and extends phalengeas

Question 36

flexor digiti minimi brevis

Answer 36

flexes proximal phalanx of 5th digit

Question 37

flexor digitorum brevis

Answer 37

flexes 2nd through 5th digits

Question 38

flexor halluces brevis

Answer 38

flexes proximal phalanx of 1st digit

Question 39

lumbricals

Answer 39

flexes proximal phalanges at MTP joint, extends phalanges at PIP and DIP joins

Question 40

plantar interossei

Answer 40

adducts digits 2-4 and flexes metatarsophalangeal

Question 41

quadratus plantae

Answer 41

corrects for oblique pull of flexor digitorum longus tendon, thus assisting in flexion of toes

Question 42

gastrocnemius

Answer 42

plantar flexes foot at ankle joint, assists in flexion of knee joint, raises heal during walking

Question 43

plantaris

Answer 43

weakly assists gastrocnemius

Question 44

popliteus

Answer 44

weakly flexes knee and unlocks it by rotating femur on fixed tibia

Question 45

soleus

Answer 45

plantar flexes foot at ankle, stabilizes leg over foot

Question 46

tibialis posterior

Answer 46

plantar flexes foot at ankle and inverts foot