CHAPTER 61

Question 1

gluteus maximus
group:
action:
innervation:

Answer 1

gluteal region
extend and laterally rotate thigh at hip
inferior gluteal nerve

Question 2

gluteus medius
group:
action:
innervation:

Answer 2

gluteal region
abduct and medially rotate thigh at hip
superior gluteal nerve

Question 3

gluteus minimus
group:
action:
innervation:

Answer 3

gluteal region
abduct and medially rotate thigh at hip
superior gluteal nerve

Question 4

tensor fasciae latae
group:
action:
innervation:

Answer 4

gluteal region
flex and medially rotate thigh at hip
superior gluteal nerve

Question 5

piriformis
group:
action:
innervation:

Answer 5

lateral rotators
laterally rotate thigh at hip
nerve to piriformis

Question 6

superior gemellus
group:
action:
innervation:

Answer 6

lateral rotators
laterally rotate thigh at hip
nerve to obturator internus and superior Gemellus

Question 7

obturator internus
group:
action:
innervation:

Answer 7

lateral rotators
laterally rotate thigh at hip
nerve to obturator internus and superior Gemellus

Question 8

inferior gemellus
group:
action:
innervation:

Answer 8

lateral rotators
laterally rotate thigh at hip
nerve to quadratus femoris and inferior gemellus

Question 9

quadratus femoris
group:
action:
innervation:

Answer 9

lateral rotators
laterally rotate thigh at hip
nerve to quadratus femoris and inferior gemellus

Question 10

obturator externus
group:
action:
innervation:

Answer 10

lateral rotators
laterally rotate thigh at hip
posterior branch of obturator nerve

Question 11

iliopsoas
group:
action:
innervation:

Answer 11

anterior thigh muscles
flexion of trunk
femoral nerve

Question 12

sartorius
group:
action:
innervation:

Answer 12

anterior thigh muscle
flex, abduct, laterally rotate thigh at hip, flex leg at knee
femoral nerve

Question 13

quadriceps femoris
rectus femoris 
group:
action:
innervation:

vastus lateralis
group:
action:
innervation:

vastus medialis
group:
action:
innervation:

vastus intermedius
group:
action:
innervation:

Answer 13

anterior thigh muscle

rectus femoris action: flex thigh at hip, extend leg at knee

all the rest action: extend leg at knee

innervation for all: femoral nerve

Question 14

gracilis
group:
action:
innervation:

Answer 14

medial thigh muscles
adduct thigh at hip, flex leg at knee
anterior branch of obturator nerve

Question 15

pectineus
group:
action:
innervation:

Answer 15

medial thigh muscles
adduct and flex thigh at hip
femoral nerve

Question 16

adductor longus
group:
action:
innervation:

Answer 16

meidal thigh muscles
adduct and flex thigh at hip
anterior branch of obturator nerve

Question 17

adductor brevis
group:
action:
innervation:

Answer 17

medial thigh muscles
adduct and flex thigh at hip
anterior branch of obturator nerve

Question 18

adductor Magnus
group:
action:
innervation:

Answer 18

medial thigh muscles
adduct and flex thigh at hip, extend thigh at hip
posterior branch of obturator nerve and tibial part of sciatic nerve

Question 19

semitendinosus
group:
action:
innervation:

Answer 19

posterior thigh muscles (hamstrings)
extend thigh at hip, flex leg at knee
tibial part of sciatic nerve

Question 20

semimembranosus
group:
action:
innervation:

Answer 20

posterior thigh muscles (hamstrings)
extend thigh at hip, flex leg at knee
tibial part of sciatic nerve

Question 21

biceps femoris 
long head 
group:
action:
innervation:

short head:
group:
action:
innervation:

Answer 21

posterior thigh muscles (hamstrings)

extend thigh at hip, flex leg at knee
tibial part of sciatic nerve

laterally rotate leg at knee
common fibular part of sciatic nerve

Question 22

pes anserinus
common insertion into the upper \_\_\_\_\_ surface of the tibia involving the tendons:
-\_\_\_\_\_
-\_\_\_\_\_
-\_\_\_\_\_

Answer 22

medial
sartorius
gracilis
semitendinosus

Question 23

tibialis anterior
group:
action:
innervation:

Answer 23

anterior leg compartment
dorsiflex and invert foot and ankle
deep fibular nerve

Question 24

extensor hallucis longus
group:
action:
innervation:

Answer 24

anterior leg compartment
extend big toe
deep fibular nerve

Question 25

extensor digitorum longus
group:
action:
innervation:

Answer 25

anterior leg compartment
extend toes 2-5
deep fibular nerve

Question 26

fibularis (peroneus) tertius
group:
action:
innervation:

Answer 26

anterior leg compartment
dorsiflex and evert foot and at ankle
deep fibular nerve

Question 27

fibularis (peroneus) longus
group:
action:
innervation:

Answer 27

lateral leg compartment
evert foot at ankle
superficial fibular nerve

Question 28

fibularis (peroneus) brevis
group:
action:
innervation:

Answer 28

evert foot at ankle

superficial fibular nerve

Question 29

gastrocnemius
group:
action:
innervation:

Answer 29

superficial posterior leg compartment
plantar flex foot at ankle
tibial nerve

Question 30

soleus
group:
action:
innervation:

Answer 30

superficial posterior leg compartment
plantar flex foot at ankle
tibial nerve

Question 31

plantaris (nickname freshman nerve)
group:
action:
innervation:

Answer 31

superficial posterior leg compartment
plantar flex foot at ankle
tibial nerve