Class 3 Flashcards
What muscles make up the anterior leg
Tibialis anterior - most superficial
Extensor digitorum longus
Extensor halluces longus
What nerve innervates the anterior. muscle and what is it nerve roots
Deep fibular (L4-L5)
What is the arterial supply of the anterior leg
Anterior tibial
Dorsali pedis at dorm of foot
What are the actions of the anterior leg muscles
Dorsiflexion of the ankle joint
Extension of the toes - EDL and EHL
What are the nerve roots of the common fibular nerve
L4-S2
What is the path of the common fibular nerve
Begins at popliteal fossa where sciatic bifurcates
Common fibular follows medial border of biceps femoris travelling laterally round the leg
Divides into superficial and deep fibular
What are the muscles of the lateral leg
Fibularis longus
Fibularis brevis
Where does fibulas longuss originate
Superior and lateral surface of fibula
Descends into foot posterior to lateral malleolus
Lies on top of brevis
What nerve runs between fibulas longus and brevis and supplies them and what is the nerve root
Superficial fibular nerve - L4-S1
What are the actions of fibularis longs and brevis
Eversion of foot
Weak plantar flexion
Where do fibularis brevis attach
Metatarsal 5
What are the muscles of the dorsum of the foot
Extensor digitorum brevis
Extensor hallucis brevis
What type of joint is the ankle joint
Synovial hinge
What movements occur at the ankle joint and when is ankle weakest
Dorsiflexion and plantar flexion (weakest)
What bones form the ankle joint
Tibia
FIbula
Talus
Form a malleolar mortise
