9/19 Anterior Leg - Carter

Question 1

Extensor hallucis longus origin, insertion, innervation, vascularization

Answer 1

O –> middle 1/2 of the ant. Fibula | interosseus membrane

I –>base of the distal phalanx of the big toe

N –> ?

V –> ?

Question 2

What is the action of the Extensor hallucis longus?

Answer 2

Dorsiflex the foot

Extend the toe

Question 3

Extensor digitorium longus origin, insertion, innervation, vascularization

Answer 3

O –> ant. Surface of the fibula | Interosseus membrane

I –> middle and distal phalanges of toes 2 - 5

N –> ?

V –> ?

Question 4

What is the action of the Extensor digitorium longus?

Answer 4

Extends the toes

Dorsiflex and evert the foot

Question 5

Peroneus tertius origin, insertion, innervation, vascularization

Answer 5

O –> distal fibula | interosseus membrane

I –> base of the 5th metatarsal

N –> ?

V –> ?

Question 6

What is the action of Peroneus tertius?

Answer 6

Dorsiflex the foot

Evert the foot

Question 7

On the posterior aspect of the leg what does the popliteal artery lead to?

Answer 7

Popliteal artery (on posterior side)
1--> posterior tibial, bifurcates into:
2-->Posterior tibial artery
2--> peroneal
3--> fibular circumflex arteries

1–> anterior tibial (leaves for ant. Through interosseus membrane

Question 8

What is the opening at the superior and inferior interosseus membrane between the tibia and fibula?

Answer 8

For vasculature to pass through

Question 9

Tibialis anterior origin, insertion, innervation, vascularization

Answer 9

O –> superior 2/3 of lateral shift of tibia | interosseus membrane

I –>
medial side of the medial 1st cuneiform| base of the 1st metatarsal

N –> deep peroneal nerve

V –> anterior tibial artery

Question 10

What is the action of the Tibialis anterior?

Answer 10

Dorsiflex the foot

Invert the foot

Question 11

Peroneus longus origin, insertion, innervation, vascularization

Answer 11

O –> lateral shaft of fibula| head of fibula

I –> medial 1st cuneiform | base of 1st metatarsal

N –> superficial peroneal nerve (branch of the common peroneal nerve)

V –> fibular circumflex arteries (branch of the peroneal artery)

Question 12

What is the action of the Peroneus longus?

Answer 12

Plantar flexion of the foot

Eversion of the foot

Supports the arch of the foot

Question 13

Know where the tendon of the plantaris muscle is

Answer 13

Medial site of leg

Question 14

Peroneus brevis origin, insertion, innervation, vascularization

Answer 14

O –> lateral shaft of the fibula

I –> base of 5th metatarsal

N –> superficial peroneal nerve (branch of the common peroneal nerve)

V –> fibular circumflex arteries (branches of the peroneal artery)

Question 15

What is the action of Peroneus brevis?

Answer 15

Everts the foot

Plantar flexes the foot