Week 9 Anterior and lateral leg Flashcards
joint classification of proximal (superior) tibiofibular joint
plane synovial joint, non weight bearing
fibrous capsule of proximal (superior) tibiofibular joint
tendon of popliteus (popliteus bursa) sits posteriorly
ligaments of proximal (superior) tibiofibular joint
- anterior ligament of head of fibula
- posterior ligament of head of fibula
movement of proximal (superior) tibiofibular joint
slight movement occurs during plantarflexion and dorsiflexion of the ankle
joint classification of distal (inferior) tibiofibular joint
compound fibrous joint (syndesmosis)
bone and articular surfaces of distal (inferior) tibiofibular joint
- medial surface distal fibula
- fibular notch of distal tibia
ligaments of distal (inferior) tibiofibular joint
- interosseous membrane –> increase area of muscle attachment
- interosseous ligament
- anterior and posteiror tibiofibular
- transverse (inferior) tibiofibular
movement of distal (inferior) tibiofibular joint
slight movement (during plantarflexion/ dorsiflexion of the ankle)
differences between proximal and distal tibiofibular joint
proximal tibiofibular joint:
- plane synovial joint
- have fibrous capsule
distal tibiofibular joint:
- compound fibrous joint (syndesmosis)
- habe interosseous membrane
- no joint cavity
what are the four muscles of anterior compartment of the leg
- tibialis anterior
- extensor digitorum longus
- extensor hallucis longus
- fibularis tertius
proximal attachment of tibialis anterior
- interosseous membrane
- lateral condyle and superior half of lateral surface of tibia
distal attachment of tibialis anterior
- base of 1st metatarsal
- medial and inferior surfaces of medial cuneiform
innervation of tibialis anterior
deep fibular nerve
main action of tibialis anterior
- dorsiflexes ankle joint
- inverts subtalar joint
proximal attachment of extensor digitorum longus
- interosseous membrane
- lateral condyle of tibia
- superior three quarters of medial surface of fibula
distal attachment of extensor digitorum longus
middle and distal phalanges of lateral four digits (2-5)
innervation of extensor digitorum longus
deep fibular nerve
main action of extensor digitorum longus
- dorsiflexes ankle joint
- extends lateral four digits
proximal attachment of extensor hallucis longus
- interosseous membrane
- middle part of anterior surface of fibula
distal attachment of extensor hallucis longus
dorsal aspect of base of distal phalanx of great toe
innervation of extensor hallucis longus
deep fibular nerve
main action of extensor hallucis longus
- dorsiflexes ankle joint
- extends great toe
proximal attachment of fibularis tertius
- interosseous membrane
- inferior third of anterior surface of fibula
distal attachment of fibularis tertius
dorsum of base of 5th metatarsal
innervation of fibularis tertius
deep fibular nerve
main action of fibularis tertius
- dorsiflexes ankle joint
- eversion of subtalar joint
what are the two muscles of lateral compartment of leg
fibularis longus
fibularis brevis
proximal attachment of fibularis longus
head and superior two thirds of lateral surface of fibula
distal attachment of fibularis longus
- base of 1st metatarsal
- medial cuneiform
innervation of fibularis longus
superficial fibular nerve
main action of fibularis longus
- weakly plantarflexes ankle joint
- everts subtalar joint
proximal attachment of fibularis brevis
inferior two third of lateral surface of fibula
distal attachment of fibularis brevis
dorsal surface of lateral side of base of 5th metatarsal
innervation of fibularis brevis
superficial fibular nerve
main action of fibularis brevis
- weakly plantarflexes ankle joint
- everts subtalar joint
common fibular nerve divides into
superficial and deep fibular nerve
motor supply of deep fibular (peroneal) nerve
tibialis anterior
extensor digitorum longus
extensor hallicus longus
fibularis tertius
cutaneous supply of deep fibular nerve
common digital nerve to 1st webspace
deep fibular (peroneal) nerve
- nerve to anterior compartment
- arises 出現 within fibularis longis at the level of neck of fibula
- courses 沿著 along the anterior aspect of interosseous membrane to dorsum of the foot
- accompanies 伴隨 anterior tibial artery
- enters dorsum of the foot anterior to ankle
- ends by supplying the skin between 1st - 2nd toes
motor supply of superficial fibular (peroneal) nerve
fibularis longus and brevis
cutaneous supply of superficial fibular (peroneal) nerve
medial and lateral cutaneous branch
superficial fibular (peroneal) nerve
- nerve to lateral compartment
- pierces 刺穿 the crucial fascia to become superficial midway down leg
- passes in front of the ankle joint to the dorsum of the foot
anterior tibial vessels - deep
great (long) saphenous vein - superficial
saphenous nerve - supply medial surface
anterior tibial vessels - deep
great (long) saphenous vein - superficial
saphenous nerve - supply medial surface
what is saphenous opening
allow the passage of great saphenous vein
arrangement of anterior ankle structures
from medial to lateral
Tibialis anterior
extensor Hallicus longus
anterior tibial Artery
anterior tibial Vein
anterior tibial Nerve
extensor Digitorum longus
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