Muscles of Anterior Compartment of Leg

Tibialis Anterior

https://anatomyaiimsrajesh.blogspot.com/

 

Ø Proximal Attachment

Lateral surface of tibia and adjacent interosseous

membrane

Ø Distal Attachment

Medial and inferior surfaces of medial cuneiform and

adjacent surfaces on base of metatarsal I

Ø Innervation

Deep fibular nerve (L4, L5)

Ø Action

Dorsiflexion of foot at ankle joint; inversion of foot;

Dynamic support of medial arch of foot

 

Extensor Hallucis Longus

 

Ø Proximal Attachment

Middle one-half of medial surface of fibula and

adjacent surface of interosseous membrane

Ø Distal Attachment

Dorsal surface of base of distal phalanx of great toe

Ø Innervation

Deep fibular nerve (L5, S1)

Ø Action

Extension of great toe and dorsiflexion of foot

 

Extensor Digitorum Longus

Ø Proximal Attachment

Proximal one-half of medial surface of fibula and related

surface of lateral tibial condyle

Ø Distal Attachment

Via dorsal digital expansions into bases of distal and middle

phalanges of lateral four toes

Ø Innervation

Deep fibular nerve (L5, S1)

Ø Action

Extension of lateral four toes and dorsiflexion of foot

 

Fibularis(Peroneus) Tertius

Ø Proximal Attachment

Distal part of medial surface of fibula

 

Ø Distal Attachment

Dorsomedial surface of base of metatarsal V

 

Ø Innervation

Deep fibular nerve (L5, S1)

Ø Action

Dorsiflexion and eversion of foot

Muscle	Extensor digitorum brevis	Extensor hallucis brevis
Proximal Attachment	Superolateral surface of the calcaneus	Superolateral surface of the calcaneus
Distal Attachment	Lateral sides of the tendons of extensor digitorum longus of toes II to IV	Base of proximal phalanx of great toe
Innervation	Deep fibular nerve (S1, S2)	Deep fibular nerve (S1, S2)
Action	Extension of toes II to IV	Extension of metatarsophalangeal joint of great toe