Posterior Leg

Question 1

The groove for the flexor hallucis longus tendon is made by what?

Answer 1

medial and lateral tubercle of the talus

Question 2

What is the sustentaculum tali?

Answer 2

shelf-like projection that supports talus and provides groove for Flexor Hallucis Longus

Question 3

What attaches on the navicular tuberosity?

Answer 3

tibialis posterior

Question 4

What are the septa of the leg?

Answer 4

1. Anterior
2. Lateral
3. Deep Posterior (fibula here)
4. Superficial Posterior

**Each septa share same general function, nerve, artery, and vein**

Question 5

What is the function and innervation of the anterior compartment of the thigh?

Answer 5

Extension at knee

femoral nerve

Question 6

What is the function and innervation of the medial compartment of the thigh?

Answer 6

Adduction at hip

Obturator nerve

Question 7

What is the function and innervation of the posterior compartment of the thigh?

Answer 7

Flexion at knee

Sciatic nerve

Question 8

What muscles are in superficial posterior group?

Answer 8

1. gastrocnemius
2. soleus
3. plantaris

Question 9

what muscles are in the deep posterior group of the leg?

Answer 9

popliteus

flexor hallucis longus

flexor digitorum longus

tibialis posterior

Question 10

What is the function and innervation of the gastrocnemius?

Answer 10

Function

• plantar flexion and flexes leg at knee joint

Innervation

• Tibial Nerve

Question 11

What is a Fabella?

Answer 11

sesamoid bone in the lateral head of gastrocnemius. can be fractured in total knee replacement.

Question 12

What is the function and innervation of the Soleus muscle?

Answer 12

Function

• plantar flexion

Innervation

• Tibial Nerve

**froms calf prominence**

Question 13

What is the function and innervation of plantaris muscle?

Answer 13

Function

• proprioceptive organ for foot position

Innervation

• tibial nerve

Question 14

What tendon is commonly used in reconstructive surgery?

Answer 14

Plantaris tendon

Question 15

What muscle may be ruptured during violent ankle movements? (ie sudden dorsiflexion of ankle joint)

Answer 15

Plantaris Muscle!

Question 16

What is the function and innervation of the popliteus muscle?

Answer 16

function

• unlocks extended leg by laterally rotating femur on a stationary tibia
• weakly flexes leg

Innervation

• tibial nerve

Question 17

What artery pierces the oblique popliteal ligament and vascularizes the knee?

Answer 17

middle genicular artery

Question 18

What are the functions and innervation of the flexor hallicus longus?

Answer 18

Function

• flexes great toe
• plantarflex foot at ankle joint

Innervation

• Tibial Nerve

Question 19

What is the function and innervation of Flexor Digitorum Longus?

Answer 19

Function

• Flexes lateral four digits
• plantarflex foot at ankle joint

Question 20

What is the function and innervation of tibialis posterior?

Answer 20

Function

• inversion
• plantar flexion

innervation

• Tibial Nerve

Question 21

What is the innervation and artery supply of the posterio compartment of the leg?

Answer 21

Tibial Nerve

Posterior Tibial Artery

Question 22

What does the tibial nerve terminate as?

Answer 22

the medial and lateral plantar nerves

Question 23

What branches off of the posterior tibial artery?

Answer 23

Fibular artery

Question 24

What does the posterior tibial artery terminate as?

Answer 24

medial and lateral plantar arteries

Question 25

Where does the fibular artery run, what does it supply, and where does it terminate?

Answer 25

1) Descends obliquely toward fibula, under FHL
2) posterior and lateral comparmens
3) Pierces interosseous membrane and anastomosing with anterior lateral malleolar artery