leg Flashcards
what nerve divides into 4 branches that innervate the different parts of leg?
Sciatic nerve
what are the 4 branches of the sciatic nerve?
- tibial nerve
- common fibular nerve
- deep branch of common fibular nerve
- superficial branch of common fibular nerve
what compartment of the leg does tibial nerve innervate?
posterior
what compartment of the leg does superficial branch of CFN innervate?
lateral
what compartment of the leg does deep branch of CFN innervate?
anterior
the common fibular nerve branches to supply what regions of the leg?
lateral and anterior
what fossa does the tibial nerve travel throug?
popliteal fossa
what muscle does CFN follow to get to lateral and anterior compartments of leg
biceps femoris
the popliteal artery divides into what 3 branches?
- anterior tibial artery
- posterior tibial artery
- fibular artery
what artery and vein travel together in the posterior compartment of the leg
posterior tibial artery and tibial nerve
what artery and vein travel together in the anterior compartment of the leg
anterior tibial artery and deep branch of CFN
(T/F) the superficial branch of the CFN travels with the anterior tibial A
FALSE. it has no travelling partners
what artery and nerve have no travelling partners
superficial branch of CFN and fibular artery
where does the fibular artery supply
lateral compartment of leg and posterior compartment of leg
what foramen does the sciatic nerve travel through?
greater sciatic nerve
(with periformis)
what 2 things travel through greater sciatic foramen
sciatic nerve and periformis
what are the 3 superficial muscles of the posterior compartment of leg
gastrocnemius
soleus
plantaris
what are the deep muscles of posterior leg
popliteus
tibialis posterior
flex digitorum longus
flexor hallicus longus
gastrocnemius origin
lateral condyle of femur (superior to medial condyle of femur)(popliteal surface)
gastrocnemius insertion
posterior aspect of calcaneus via calcaneal tendon
gastrocnemius action
- flexion at knee
- plantarflexion at ankle when knee is extended
- raises heel when walking
gastrocnemius innervation
tibial nerve
gastrocnemius artery
posterior tibial artery
soleus origin
posterior fibula (superior 1/4)
posterior tibia - soleal line
soleus insertion
posterior aspect of calcaneus via calcaneal tendon
soleus action
- plantarflexion at ankle
soleus innervation
tibial nerve
soleus artery
posterior tibial artery
plantaris origin
lateral condyle of femur
plantaris insertion
posterior aspect of calcaneus via calcaneal tendon
plantaris action
- weak plantarflexion at ankle
- proprioception
plantaris innervation
tibial nerve
plantaris artery
posterior tibial artery
popliteus origin
lateral surface of lateral condyle of femur
popliteus insertion
posterior surface of tibia - region above soleal line
popliteus action
- week knee flexion
- unlocks knee: rotate femur laterally on fixed tibia. rotate tibia on unplanted limb
popliteus innervation
tibial nerve
popliteus artery
posterior tibial artery
tibialis posterior origin
posterior tibia and fibula
interosseous membrane
tibialis posterior insertion
navicular
cuneiform (MIL)
cuboid
base of metatarsals 2-4
tibialis posterior action
- inversion of foot (tilting sole towards midline)
- plantarflexion at ankle
tibialis posterior innervation
tibial nerve
tibialis posterior artery
posterior tibial artery
flexor hallucis longus origin
posterior fibula
interosseous membrane
flexor hallucis longus insertion
base of distal phalange 1 (big toe)
flexor hallucis longus action
- plantarflexion at ankle
- flexion at joints proximal to insertion
flexor hallucis longus innervation
tibial nerve
flexor hallucis longus artery
posterior tibial artery
flexor digitorum longus origin
posterior tibia
interosseous membrane
flexor digitorum longus insertion
base of distal phalanges (2-5)
flexor digitorum longus action
- plantarflexion at ankle
- flexion at joints proximal to insertion
flexor digitorum longus innervation
tibial nerve
flexor digitorum longus artery
posterior tibial artery
what is the interosseus membrane?
ligament between fibula and tibia
what does tibialis posterior do that FDH & FHL dont?
inversion of foot
how many muscles in anterior compartment of leg? what are they?
- tibialis anterior
- extensor hallicus longus
- extensor digitorum longus
tibialis anterior origin
lateral surface of tibia
interosseus membrane
tibialis anterior insertion
1st metatarsal
medial cuneiform
tibialis anterior action
- inversion of foot
- dorsiflexion at ankle
tibialis anterior innervation
deep branch of CFN
tibialis anterior artery
anterior tibial artery
extensor hallicis longus origin
anterior fibula
interosseus membrane
extensor hallicis longus insertion
distal phylange digit 1 (big toe)
extensor hallicis longus action
- dorsiflexion at ankle
- extension of big toe (extension of joints proximal to insertion)
extensor hallicis longus innervation
deep branch CFN
extensor hallicis longus artery
anterior tibial artery
extensor digitorum longus origin
anterior fibula
interosseus membrane
extensor digitorum longus insertion
middle & distal phalanges of 2-5
extensor digitorum longus action
- dorsiflexion at ankle
- extension of digits 2-5 (extension of joints proximal to insertion )
extensor digitorum longus innervation
deep branch of CFN
extensor digitorum longus artery
anterior tibial artery
what 2 muscles on lateral compartment of leg?
fibularis longus
fibularis brevis
fibularis longus origin
lateral aspect of fibula (superior to attachment of brevis)
fibularis longus insertion
medial cuneiform
base of 1st metatarsal
fibularis longus action
- weak plantar flexion at ankle
- eversion of foot
fibularis longus innervation
superficial branch of CFN
fibularis longus artery
fibular artery
fibularis brevis origin
lateral aspect of fibula (inferior to longus)
fibularis brevis insertion
base of 5th metatarsal
fibularis brevis action
- weak plantarflexion
- eversion of foot
fibularis brevis innervation
superficial branch CFN
fibularis brevis artery
fibular artery