14. Anterolateral Leg (No OIAN)

Question 1

What provides blood supply to the lateral compartment of the leg?

Answer 1

Perforating branches of the fibular artery

Question 2

Where does the common fibular nerve split into the superficial and deep branches?

Answer 2

Between the fibula and the fibularis longus muscle, around the head of the fibula

Question 3

What is the Fibular Trochlea?

Answer 3

A ridge on the lateral surface of the calcaneus

Question 4

What are the terminal branches of the anterior tibial artery?

Answer 4

Dorsalis pedis

Lateral malleolar artery

Question 5

What provides sensation to the majority of the dorsum of the foot?

Answer 5

Superficial fibular nerve (misses the flip flop spot supplied by the medial branch of the deep fibular)

Question 6

Why do you often see edema in the legs of elderly people?

Answer 6

Because their crural fascia is more lax, and thus their musculovenous pump is less effective

Question 7

What are the terminal branches of the deep fibular nerve?

Answer 7

Medial and Lateral branches of the deep fibular nerve

Question 8

What artery supplies the anterior compartment?

Answer 8

Anterior tibial artery

Question 9

The extensor retinaculum is a thickening of what structure?

Answer 9

The crural fascia

Question 10

What muscle does fibularis tertius fuse with?

Answer 10

Extensor digitorum longus

Question 11

What compartment of the leg contains no arteries?

Answer 11

The lateral compartment

Question 12

What bone has a specific groove for the fibularis longus?

Answer 12

The cuboid

Question 13

What three muscles are responsible for eversion of the foot?

Answer 13

Fibularis longus and brevis

Fibularis tertius

Question 14

What is the function of the lateral branch of the deep fibular nerve?

Answer 14

Innervates the intrinsic muscles of the dorsum of the foot (extensor hallucis brevis and extensor digitorum brevis)

Question 15

Where is the common fibular nerve vulnerable to being struck?

Answer 15

Where it winds around the head of the fibula, because it is the most superficial there.

Question 16

What muscle should we associate with shin splints?

Answer 16

Tibialis anterior

Question 17

What two muscles invert the foot?

Answer 17

Tibialis posterior and anterior

Question 18

What nerve supplies the muscles of the anterior compartment?

Answer 18

Deep fibular nerve

Question 19

What is the function of the medial branch of the deep fibular nerve?

Answer 19

Sensory innervation to the flip flop area

(medial branch innervates part of the medial two toes)

Question 20

What pulley structure on the calcaneus does the tendon of the fibularis longus muscle pass under?

Answer 20

Fibular trochlea

Question 21

What might cause foot drop?

Answer 21

Injury to the common fibular nerve (in the case of loss of both dorsiflexion and eversion)

Injury to the deep fibular nerve (in the case of loss of just dorsiflexion, but not eversion)

Question 22

What does “peroneal” mean?

Answer 22

Fibular

Question 23

How does the musculovenous pump in the leg work?

Answer 23

The crural fascia is tight enough that when the muscles of the leg contract, they must expand inward instead of outward. This pushes blood up the veins of the leg, since they have valves that prevent blood from seeping down the leg.

Question 24

What vessel does the fibular artery come off of?

Answer 24

The posterior tibial artery

Question 25

What nerve supplies the muscles of the lateral compartment?

Answer 25

Superficial fibular nerve

Question 26

What kind of gait accompanies damage to the common fibular nerve?

Answer 26

“High stepping gait”

Question 27

What artery runs with the deep fibular artery?

Answer 27

The anterior tibial artery