Anterior and Lateral Leg

Question 1

What is the innervation of the tibialis anterior?

Answer 1

Deep fibular nerve (L4,5)

Question 2

What is the blood supply to the extensor digitorum longus?

Answer 2

Anterior tibial artery

Question 2

What is the innervation of the fibularis tertius?

Answer 2

Deep fibular nerve

Question 3

Where can you find the medial (deltoid) ligament of the ankle?

Answer 3

Attaches medial malleolus to multiple tarsal bones

Question 4

What is the blood supply to the fibularis longus?

Answer 4

Fibular branch of the posterior tibial artery

Question 4

What is the blood supply to the fibularis brevis?

Answer 4

Fibular branch of the posterior tibial artery

Question 5

What is the proximal attachment of the tibialis anterior?

Answer 5

Proximal tibia, fibula and interosseous membrane

Question 5

What is the function of the collateral ligament complex of the ankle joint?

Answer 5

Resist inversion of the ankle joint

Question 5

What is a Pott’s fracture?

Answer 5

Occurs when foot is forcibly everted. This pulls on the strong medial ligament

Question 6

How does the most common ankle joint injury occur?

Answer 6

Foot plantar flexed, inverted, and abducted. Strain forced on calcaneofibular and anterior talofibular ligaments of the LATERAL ligament of the ankle joint

Question 7

What is the blood supply to the fibularis tertius?

Answer 7

Anterior tibial artery

Question 7

What is the proximal attachment of the fibularis brevis?

Answer 7

Inferior lateral surface of fibula

Question 9

What is the proximal attachment of the extensor hallucis longus?

Answer 9

Proximal tibia, fibula, and interosseous membrane

Question 10

What is the distal attachment of the fibularis longus?

Answer 10

Base of the 1st metatarsal and medial cuneiform

Question 10

What is the distal attachment of the fibularis brevis?

Answer 10

Dorsal surface of tuberosity on lateral side of base of 5th metatarsal

Question 10

What is the action of the fibularis brevis?

Answer 10

Everts foot and weakly plantarflexes

Question 11

What is the distal attachment of the extensor digitorum longus?

Answer 11

Middle and distal phalanges of lateral four digits

Question 12

What is the distal attachment of the tibialis anterior?

Answer 12

Superior aspect of the medial tarsal bones

Question 13

Where can you find the lateral collateral ligament complex of the ankle joint?

Answer 13

Lateral malleolus to talus and calcaneus

Question 15

What is the action of the extensor hallucis longus?

Answer 15

Extends great toe and dorsiflexes

Question 16

What is the innervation of the extensor digitorum longus?

Answer 16

Deep fibular nerve (L4,5)

Question 16

What is the action of the fibularis tertius?

Answer 16

Dorsiflexes ankle and aids in eversion of the foot

Question 18

What is the blood supply to the tibialis anterior?

Answer 18

Anterior tibial artery

Question 19

What type of joint is the talocrural joint?

Answer 19

Hinge (allows dorsiflexion and plantarflexion)

Question 21

What is the distal attachment of the extensor hallucis longus?

Answer 21

Distal phalanx of great toe (hallux)

Question 22

What is the blood supply to the extensor hallucis longus?

Answer 22

Anterior tibial artery

Question 23

What is the proximal attachment of the fibularis longus?

Answer 23

Head and lateral surface of fibula

Question 25

What is the innervation of the extensor hallucis longus?

Answer 25

Deep fibular nerve (L4,5)

Question 26

What is the action of the tibialis anterior?

Answer 26

Dorsiflexes and inverts foot

Question 27

What three bones articulate to form the ankle joint?

Answer 27

Medial malleolus of tibia, lateral malleolus of fibula, and talus

Question 29

What is the innervation of the fibularis brevis?

Answer 29

Superficial fibular nerve (L5,S1,2)

Question 31

What is the proximal attachment of the extensor digitorum longus?

Answer 31

Proximal tibia, fibula, and interosseous membrane

Question 31

What is the action of the extensor digitorum longus?

Answer 31

Extends lateral four digits and dorsiflexes

Question 32

What type of joint is the subtalar joint?

Answer 32

Gliding (allows inversion and eversion)

Question 33

What is the distal attachment of the fibularis tertius?

Answer 33

Dorsal surface of the 5th metatarsal

Question 35

What is the function of the interosseous membrane?

Answer 35

Stabilizes the tibiofibular junction and provides attachment for many of the leg muscles

Question 36

What is the action of the fibularis longus?

Answer 36

Everts foot and weakly plantarflexes

Question 37

Where is the interosseous membrane?

Answer 37

Strong fibrous sheet that connects the interosseous margin of the tibia and the interosseous margin of the fibula

Question 39

What is the proximal attachment of the fibularis tertius?

Answer 39

Inferior third of the anterior surface of the fibula and interosseous membrane

Question 40

What is the innervation of the fibularis longus?

Answer 40

Superficial fibular nerve

Question 41

What is the function of the deltoid ligament?

Answer 41

Stabilizes the medial side of the ankle, prevents excessive eversion of the ankle joint. Anterior parts limit plantar flexion and posterior parts limit dorsiflexion