Leg

Question 1

The leg has how many compartments?

Answer 1

3: posterior, deep, & anterior

Question 2

*What is the extension of crural fascia to fibula, separating anterior and lateral compartments?

1. anterior intermuscular septum
2. posterior intermuscular septum
3. deep transverse fascia
4. interosseous membrane

Answer 2

1. anterior intermuscular septum

Question 3

*What is the extension of crural fascia to fibula, separating lateral and posterior compartments?

1. anterior intermuscular septum
2. posterior intermuscular septum
3. deep transverse fascia
4. interosseous membrane

Answer 3

2. posterior intermuscular septum

Question 4

*What passes across the calf from the fibula to the tibia, subdividing the posterior compartment into superficial and deep layers?

1. anterior intermuscular septum
2. posterior intermuscular septum
3. deep transverse fascia
4. interosseous membrane

Answer 4

3. deep transverse fascia

Question 5

*What is between the shafts of the tibia and fibula, which provides areas for muscle attachments?

1. anterior intermuscular septum
2. posterior intermuscular septum
3. deep transverse fascia
4. interosseous membrane

Answer 5

4. interosseous membrane

Question 6

Posterior compartment has what muscles in the superficial (3) and deep (4) compartments?

Answer 6

Superficial (triceps surae):

1. gastrocnemius
2. soleus
3. plantaris

Deep:

1. poplieus
2. flexor digitorum longus
3. flexor hallucis longus
4. tibialis posterior

Question 7

Gastrocnemius
O:
I:

Answer 7

O: medial & lateral head:
posterior superior to medial & lateral condyles of femur

I: posterior surface of calcaneous via calcaneal tendon

Question 8

Gastrocnemius
Innerv:
Function:

Answer 8

Innervation: tibial n.

Function:

1. plantarflexes ankle (most effective when knee is extended)
2. raises heel during walking
3. flexes leg at knee

Question 9

Soleus
O:
I:

Answer 9

O: head & proximal surface of fibula; soleal line of tibia

I: posterior surface of calcaneus via calcaneal tendon

Question 10

Soleus
Innerv:
Function:

Answer 10

Innerv: tibial n.

Function:

1. plantarflexes ankle
2. steadies leg on foot in weightbearing (WIDE m.)

Question 11

Tendons of the deep posterior compartment run deep to what?

Answer 11

flexor retinaculum

Question 12

Popliteus
O:
I:

Answer 12

O: lateral aspect of lateral condyle of femur, lateral meniscus

I: posterior surface of tibia, superior to soleal line

Question 13

Popliteus
Innerv:
Function

Answer 13

Innerv: tibial n.

Function:

1. weakly flexes knee
2. unlocks knee (external rotation of femur on fixed tibia)

Question 14

Flexor digitorum longus
Innerv:
Function:

Answer 14

Innerv: tibial n.

Function:

1. flexes digits 2-5
2. plantarflexes ankle

Question 15

Tibialis posterior

O:

Answer 15

O: interosseous membrane

Question 16

Tibialis posterior
Innerv:
Functions:

Answer 16

Innerv: tibail n.

Function:

1. plantarflexes ankle
2. inverts foot

Question 17

Flexor hallucis longus

O:

Answer 17

O: inferior 2/3 of posterior fibula & interosseous membrane

Question 18

Flexor hallucis longus
Innerv:
Functions:

Answer 18

Innver: tibial n.

Function:

1. flexes great toe
2. plantarflexes ankle
3. supports medial longitudinal arch (passive tension)

Question 19

Where does the tibial n. and the posterior tibial vessels run?

Answer 19

between the deep and superficial group of muscles, deep to the transverse intermuscular septums

Question 20

In the sole of the foot, what does the tibial nerve become?

Answer 20

medial and lateral plantar nerves

Question 21

What nerve travels superficially with small saphenous vein (in the posterior leg) & provides cutaneous innervation to the posterolateral leg & lateral leg?

Answer 21

sural n.

Question 22

The popliteal artery becomes what artery in the posterior leg?

Answer 22

posterior tibial a.

Question 23

The posterior tibial a. divides in the foot to become what arteries?

Answer 23

medial & lateral plantar branch a.

Question 24

The fibular a. comes off what a.?

Answer 24

posterior tibial a.

Question 25

The posterior tibial a. runs with what n.?

Answer 25

tibial n.