Session 33 - The Anterior Leg and Dorsum of the Foot

Question 1

Which nerves supply the anterior and lateral compartments of the leg?

Answer 1

Anterior = deep peroneal nerve
Lateral = superficial peroneal nerve

Question 2

Where is the common peroneal nerve vulnerable to injury? What would be the
result of an injury to it?

Answer 2

Vuln cos wraps around neck of fibula
Damage caused by fractures and direct trauma

Result is weakness of the anterior and lateral leg muscles
Foot drop caused
Sensation over the lateral leg and dorsum of the foot is also impaired

Question 3

Which artery supplies the anterior compartment of the leg? Where does this
artery arise from?

Answer 3

Anterior tibial artery

Popliteal artery

Question 4

What muscles extends the toes?

Answer 4

Extensor hallucis longus extends the big toe.

Extensor digitorum longus and extensor digitorum brevis extend toes 2-5.

Question 5

What nerve innervates the toe extensors?

Answer 5

Deep peroneal nerve

Question 6

Where are pulses palpable in the leg? Give the name of the arteries and the
locations where they can be palpated

Answer 6

 The popliteal pulse - popliteal fossa.
 The posterior tibial pulse - posterior to the medial malleolus.
 The dorsalis pedis pulse - dorsum of the foot

Question 7

What complications can arise from an open fracture of the tibial shaft?

Answer 7

Infection of bone - osteomyelitis

Question 8

What movements take place at the ankle joint?

Answer 8

Dorsiflexion

Plantarflexion

Question 9

Dorsiflexion is toes?

Answer 9

Up

Question 10

Plantarflexion is toes?

Answer 10

Down

Question 11

What movements occur at the subtalar joint?

Answer 11

Inversion and eversion of the foot