Muscle Of The Anterior Compartment Of The Lower leg Flashcards
What are the four muscles in the Anterior Compartment of the lower leg?
Tibialis anterior, Extensor Hallucis Longus, Extensor Digitorum Longus, Fibularis Tertius
What is the origin of the tibialis anterior?
Lateral surface of tibia and adjacent interosseous membrane
What is the insertion of the tibialis anterior?
Medial and inferior surfaces of medial cuneiform and adjacent surfaces on base of metatarsal 1
What is the innervation of the tibialis anterior?
Deep fibular nerve (L4, L5)
What is the function of the tibialis anterior?
Dorsiflexion of the foot at ankle joint, inversion of the foot, dynamic support of medial arch of foot
What is the origin of the Extensor Hallucis Longus?
Middle one half of medial surface of fibula and adjacent surface of interosseous membrane
What is the insertion of the extensor Hallucis Longus?
Dorsal surface of base of distal phalanx of great toe
What is the innervation of the extensor Hallucis Longus?
Deep fibular nerve (L5, S1)
What is the function of the extensor Hallucis Longus?
Extends the great toe and dorsiflexion of the foot
What is the origin of the extensor Digitorum Longus?
Proximal one-half of medial surface of fibula and related surface of lateral tibial condyle
What is the insertion of the Extensor Digitorum Longus?
Via dorsal digital expansions into bases of distal and middle phalanges of lateral four toes
What is the innervation of the extensor Digitorum Longus?
Deep fibular nerve (L5, S1)
What is the function of the Extensor Digitorum Longus?
Extension of lateral four toes and dorsiflexion of foot
What is the origin of the Fibularis Tertius?
Distal part of medial surface of fibula
What is the insertion of the Fibularis Tertius?
Dorsomedial surface of base of metatarsal 5
What is the innervation of the Fibularis Tertius?
Deep fibular nerve (L5, S1)
What is the function of the Fibularis Tertius?
Dorsiflexion and eversion of the foot
