Leg

Question 1

How many compartments in the leg? What are they?

Answer 1

4
anterior
lateral
superficial posterior
deep posterior

Question 2

What nerve innervates the muscles of the anterior compartment of the leg?

Answer 2

deep fibular nerve

Question 3

What nerve innervates the muscles of the lateral compartment of the leg?

Answer 3

superficial fibular nerve

Question 4

What nerve innervates the muscles of the superficial posterior compartment of the leg?

Answer 4

tibial nerve

Question 5

What nerve innervates the muscles of the deep posterior compartment of the leg?

Answer 5

tibial nerve

Question 6

How many muscles in each of the compartments of the leg?

Answer 6

anterior: 4
lateral: 2
deep posterior: 4
superficial posterior: 3

Question 7

What are the 4 muscles in the anterior compartment of the leg?

Answer 7

tibialis anterior
extensor digitorum longus
extensor hallucis longus
fibularis tertius

Question 8

What are the 2 muscles in the lateral compartment of the leg?

Answer 8

fibularis longus

fibularis brevis

Question 9

What are the 4 muscles in the deep posterior compartment of the leg?

Answer 9

tibialis posterior
flexor digitorum longus
flexor hallucis longus
popliteus

Question 10

What are the 3 muscles in the superficial posterior compartment of the leg?

Answer 10

gastrocnemius
soleus
plantaris

Question 11

Dorsiflexion = _________
Plantarflexion = __________
(extension, true flexion)

Answer 11

dorsiflexion = extension
plantarflexion = true flexion

Question 12

What is the main action of the muscles of the anterior compartment?

Answer 12

extension (dorsiflexion), inversion

Question 13

What is the main action of the muscles of the lateral compartment?

Answer 13

eversion

Question 14

What is the main function of the muscles of the deep compartment?

Answer 14

plantarflexion, flex toes

Question 15

What is the main function of the muscles of the superficial compartment?

Answer 15

plantarflexion

Question 16

What are the 5 retinacula of the leg/foot?

Answer 16

flexor retinaculum of the foot
inferior extensor retinaculum
superior extensor retinaculum
inferior fibular retinaculum
superior fibular retinaculum

Question 17

What is unique about the muscle fibers of gastrocnemius and soleus?

Answer 17

gastrocnemius: fast twitch
soleus: slow twitch
(most human muscles are a mix of fibers)

Question 18

What passes under the sustenaculum tali?

Answer 18

flexor hallucis longus tendon

Question 19

What is the function of the popliteus muscle?

Answer 19

unlock the knee at the inception of flexion

Question 20

What nerve innervates the webbing between the first and second toes?

Answer 20

deep fibular nerve

Question 21

What structures pass posterior to the medial malleolus?

Answer 21

"Tom Dick van Harry"
Tibialis posterior tendon
flexor Digitorum tendon
posterior tibial Vein
posterior tibial Artery
tibial Nerve
flexor Hallucis longus tendon

Question 22

What does the sciatic nerve branch into, usually in the popliteal fossa?

Answer 22

sciatic branches into:
tibial nerve
common fibular nerve

Question 23

What artery becomes the dorsalis pedis when it crosses the ankle?

Answer 23

anterior tibial artery

Question 24

What are the 3 arteries of the leg?

Answer 24

Anterior tibial artery
Posterior tibial artery
Fibular artery