Lower limb 3

Question 1

3 compartments of lower leg and the innervation of each compartment

Answer 1

Anterior -> deep fibular nerve

Lateral -> superficial fibular nerve

Posterior -> tibial nerve

Question 2

4 muscles in anterior leg

(and what muscle is in this picture)

Answer 2

tibialis anterior

extensor digitorum longus

extensor hallicus longus

fibularis tertius

(fibularis tertisu is in the picture)

Question 3

Anterior compartment of anterior leg main actions on ankle joint and toes

Answer 3

ankle -> dorsiflexion

toes -> extension

Question 4

Innervation of anterior compartment of leg

Answer 4

Deep fibular nerve

(branch from common fibular)

fibular= peroneal

Question 5

Terminal branch of popliteal artery supplying anterior leg

Answer 5

Anterior tibial artery

Question 6

Which artery runs midway between malleoli?

Answer 6

Dorsalis pedis

(bracnches from anterior tibial artery)

Question 7

2 muscles of lateral compartment of leg

Answer 7

fibularis longus

fibularis brevis

Question 8

Action of lateral compartment of leg muscles on foot and ankle

Answer 8

Foot -> eversion

Ankle -> plantarflexion (weak)

Question 9

Which fibular nerve supplies lateral compartment?

Answer 9

Superficial fibular nerve

(remember that fibular=peroneal, i don’t fucking know why)

Question 10

Common fibular nerve injury

Answer 10

Foot drop

Anterior and lateral muscles affected

Question 11

Articular surfaces of ankle

Answer 11

distal end of tibia & fibula

superior part of talus

Question 12

When is malleolar grip tightest?

Answer 12

Dorsiflexion

Question 13

When is the ankle joint most unstable?

Answer 13

Plantarflexion

Question 14

Which ligament of ankle is weakest?

Answer 14

Lateral ankle ligament

made up of 3 ligamanets:

• anteiror talo-fibular ligament
• posterior talo-fibular ligament
• calcaneo-fibular ligament

Question 15

Which ligament of ankle is also known as deltoid ligament?

Answer 15

Medial collateral ligament

Question 16

During which movement of the subtalar joint does injury most commonly occur?

Answer 16

Inversion

(can also be injury during plantarflexion and weight-bearing)

Question 17

Proximal tibio-fibular joint type

Answer 17

Synovial plane

Question 18

distal tibio-fibular joint type

Answer 18

Fibrous

Question 19

Sensory nerves of the leg

Question 20

Where is the cutaneous innervation of the saphenous nerve

Answer 20

Medial aspect of leg

Question 21

Which muslce can cause entrapment of the common fibular nerve

Answer 21

Fibularis longus

Question 22

What is the cutanoeus innervation of the sural nerve

Answer 22

Back of leg on the lateral side

Lateral side of the foot