Structures

  • Tibialis anterior
  • Extensor hallusis longus
  • Extensor digitorum longus
  • Fibularis/ Peroneus tertius
MuscleActionOriginInsertionInnervationBlood supply
Tibialis anterior- Lateral tibial condyle and 2/3 shaft
- Interosseous membrane
- Medial and inferior medial cuneiform
- Base of 1st metatarsal
- Deep fibular nerve: L4 ,L5- Dorsiflexion of foot I
- Inversion of foot
- Support of medial foot arch
- Anterior tibial artery
Extensor hallucis longus- Middle 1/2 of medial fibula
- Interosseous membrane
- Dorsal base of distal phalanx of great toe- Deep fibular nerve: L5,S1- Extension of great toe
- Dorsiflexion of foot
- Anterior tibial artery
Extensor digitorum longus- Proximal 1/2 medial surface of fibula
- Lateral tibial condyle
- Via 4 tendons into bases of distal and middle phalanges of lateral four toes- Deep fibular nerve: L5,S1- Extension of lateral four toes
- Dorsiflexion of foot
- Anterior tibial artery
Fibularis/ Peroneus tertius- Distal part of medial fibula- Dorsomedial surface of base of 5th metatarsal - Deep fibular nerve: L5,S1- Dorsiflexion of foot
- Eversion of foot
- Anterior tibial artery