The Leg & Ankle Region II

Question 1

posterior compartment of the leg:

superficial muscles (3)

deep muscles (4)

Answer 1

gastrocnemius
plantaris
soleus

popliteus
flexor digitorum longus
flexor hallucis longus
tibialis posterior

Question 2

posterior compartment of the leg:

blood supply (1)

nerve(s)

group action(s)

Answer 2

posterior tibial artery

tibial nerve

plantar flexion

Question 3

posterior compartment of the leg:
superficial muscles:
gastrocnemius muscle:

nerve(s)

action(s)

Answer 3

tibial nerve

plantar flexes foot at ankle joint
flexes leg at knee joint

Question 4

posterior compartment of the leg:
superficial muscles:
soleus:

nerve(s)

action(s)

Answer 4

tibial nerve

plantar flexes foot

Question 5

posterior compartment of the leg:
supreficial muscles:
gastrocnemius bellies & soleus:

___

action(s)

Answer 5

tricepsp surae

main plantar flexor of the foot

Question 6

posterior compartment of the leg:
superficial muscles:
plantaris:

nerve(s)

action(s)

Answer 6

tibial nerve

assists w/ plantar flexion of foot
assists w/ flexion of leg at knee joint

Question 7

posterior compartment of the leg:
deep muscles:
popliteus:

nerve(s)

action(s)

Answer 7

tibial nerve

medial rotation of tibia if leg is free
lateral rotation of femur if foot is on ground

Question 8

posterior compartment of the leg:
deep muscles:
flexor digitorum longus:

nerve(s)

action(s)

Answer 8

tibial nerve

flexes toes
plantar flexes the foot

Question 9

posterior compartment of the leg:
deep muscles:
flexor hallucis longus:

nerve(s)

action(s)

Answer 9

tibial nerve

flexes great toe
plantar flexes foot

Question 10

posterior compartment of the leg:
deep muscles:
tibialis posterior:

nerve(s)

action(s)

Answer 10

tibial nerve

inverts & plantar flexes foot

Question 11

posterior compartment of the leg:
tibial nerve:

passes downward from ___ fossa b/n two heads of ___ muscle, then deep to ___ muscle

courses straight down the leg on the (medial/lateral) side of the ___ artery

passes behind the ___ onto the ___ surface of the foot dividing into the ___ & ___ nerves

Answer 11

popliteal fossa
gastrocnemius
soleus

lateral
posterior tibial artery

medial malleolus
plantar surface
medial & lateral plantar nerves

Question 12

posterior compartment of the leg:
popliteal artery:

accompanies the ___ nerve deep to the ___ & ___ muscles

gives off the ___ & ___ arteries

terminates by dividing into the ___ & ___ arteries at the lower border of the ___ muscle

Answer 12

tibial nerve
gastrocnemius & soleus muscles

genicular & sural arteries

anterior & posterior tibial arteries
popliteus muscles

Question 13

posterior compartment of the leg:
posterior tibial artery:

(smallest/largest) of two terminal branches

runs downward w/ the ___ nerve

passes posterior to the ___

divides into ___ & ___ arteries which accompany the ___ nerves

Answer 13

largest

tibial nerve

medial malleolus

medial & lateral plantar arteries
corresponding nerves

Question 14

posterior compartment of the leg:
posterior tibial artery:
major branches (2)

Answer 14

nutrient artery of the tibia

fibular artery

Question 15

posterior compartment of the leg:
posterior tibial artery:
major branches:

nutrient artery of the tibia: largest ___ artery in the body

fibular artery: (smallest/largest) branch of the posterior tibial artery

• descends b/n the ___ & ___
• main blood supply for the ___ & ___ muscles

Answer 15

nutrient

largest

• tibialis posterior & flexor hallucis longus
• flexor hallucis longus & lateral compartment

Question 16

ankle region:

common site of ___ & ___

important to know arrangement of ___, ___, & ___

Answer 16

fractures
sprains

tendons
nerves
vessels

Question 17

posterior aspect of ankle:

behind medial malleolus (deep to flexor retinaculum, medial to lateral) (5)

Answer 17

tibialis posterior
flexor digitorum longus
posterior tibial artery
tibial nerve
flexor hallucis longus

Question 18

posterior aspect of ankle:
behind lateral malleolus:

deep to fibular retinacula (2)

superficial to fibular retinacula (2)

Answer 18

fibularis longus
fibularis brevis

sural nerve
small saphenous vein

Question 19

anterior aspect of ankle:

deep to extensor retinacula (medial to lateral) (6)

Answer 19

tibialis anterior
extensor hallucis longus
anterior tibial artery
deep fibular nerve
extensor digitorum longus
fibularis tertius

Question 20

anterior aspect of ankle:

superficial to extensor retinacula (2)

Answer 20

saphenous nerve & great saphenous vein (immediately anterior to medial malleolus)

superficial fibular nerve