Muscles of the anterior leg compartment

Question 1

Describe the muscles of the anterior compartment of the leg

Name these muscles?

Answer 1

Dorsiflex and invert the foot at ankle joint. All innervated by L4-S1 (fibular nerve) and blood is supllied by the anterior tibial artery.

Tibialis anterior
Extensor digitorum longus
Extensor hallicus longus

Question 2

What is tibialis anterior

What innervates it

Answer 2

Muscle on the lateral side of the tibia. Strongest dorsiflexor of the foot

Deep fibular nerve

Question 3

What are tibialis anteriors attachments

What are its actions?

Answer 3

Originates from the lateral surface of the tibia and inserts to the medial cunfiform at the base of metatarsal I

Dorsiflex and invert the foot

Question 4

What is extensor digiorum longus?

What innervates it?

Answer 4

Lies lateral and deep to tibialis anetrior, its tendons can be palpated on the the dorsal aspect of the foot

Deep fibular nerve

Question 5

What are the attachments of extensor digitorum longus?

What are its actions

Answer 5

originates from the lateral condyle of the tubia and medial surface of the fibula. Attches via a tendon that travels to the dorsa; surface of the foot and then splits into four, each inserting into a toe (minus big toe)

Extersion of four lateral toes

Question 6

What is extensor hallicus longus?

What innervates it

Answer 6

Located deep to EDL and TA

Deep fibular nerve

Question 7

What are the attchement points of extensor hallicus longus

What are its actions?

Answer 7

Originates from the medial surface of the fibular shaft. Tednon crosses anterior to the ankle joint and attches to the base of the distal phalanx of the great toe

Allows for extension of the big toe and dorsiflexion of the foot.