Anatomy 1 - Lower leg muscles Flashcards
Origin of tibialis anterior?
- Lateral tibial condyle
- Upper half of lateral shaft of the tibia
Insertion of tibialis anterior?
- Base of metatarsal bone 1 (hallux)
- Medial cuneiform
Function of tibialis anterior?
Dorsiflexion at ankle joint (talocrural/tibiotalar joint), inversion (subtalar joint)
Origin of extensor hallucis longus?
- Anterior surface of tibia+fibula
- Interosseous membrane
Insertion of extensor hallucis longus?
Distal phalanx of digit 1 (great toe, hallux) (dorsal surface)
Function of extensor hallucis longus?
- Dorsiflexion at ankle joint (tibiotalar/talocrural)
- E of big toe
Origin of extensor hallucis brevis?
Calcaneus (dorsal portion)
Insertion of extensor hallucis brevis?
Proximal phalanx of digit 1 (great toe, hallux) (dorsal surface)
Function of extensor hallucis brevis?
E of big toe
Origin of extensor digitorum longus?
- Lateral condyle of tibia
- Fibular shaft
- Interosseous membrane
Insertion of extensor digitorum longus?
Distal phalanges of digits 2-5
Function of extensor digitorum longus?
- E of toes (except big toe)
- Dorsiflexion at ankle joint (talocrural /tibiotalar)
- Eversion at subtalar joint
Origin of extensor digitorum brevis?
Calcaneus (dorsal and lateral surface)
Insertion of extensor digitorum brevis?
Extensor digitorum longus tendons of toes 2-4
Function of extensor digitorum brevis?
E toes 2-4
Origin fibularis (peroneus) tertius?
- Anterior surface of fibula
- Tibiofibular ligament
- Intermuscular septum
Insertion fibularis (peroneus) tertius?
Fifth metatarsal bone (dorsal surface)
Function fibularis (peroneus) tertius?
- Dorsiflexion at ankle joint (talocrural /tibiotalar)
- Eversion at subtalar joint
Origin of gastrocnemius?
- Medial head: medial epicondyle of femur
- Lateral head: lateral epicondyle of femur
Insertion of gastrocnemius?
- Posterior surface of the calcaneus
- via Achilles tendon (calcaneal tendon)
–> like soleus, plantaris