Muscles of the leg Flashcards
Compartments of the leg
Anterior compartment
Lateral compartment
Posterior compartment
Muscles of the lateral compartment
Peronues longus
Peronues brevis
Blood supply to muscles of the lateral compartment
Br. Of peroneal artery
Nerve supply of lateral compartment
Superficial peroneal nerve
Origin of muscles of lateral compartment
Lateral surface of fibula
Longus > upper
Brevis > lower
Insertion of muscles of lateral compartment
In metatarsal bones
Longus > plantar of 1st
Brevis > base of 5th
Action of muscles of lateral compartment
Plantar flextion and elevation of the foot
Injury of common peroneal nerve causes ………..
Foot drop
Muscles of anterior compartment of leg
Tibialis anterior
Extensor hallucis longus
Extensor digitorum longus
Peroneus terius
Blood supply to anterior compartment of leg
Anterior tibial artery
Nerve supply to the anterior compartment of the leg
Deep peroneal nerve
Origins of muscles of anterior compartment of Leg
All from anterior surface of the Fibula and interosseous membrane
EXP. >Tibialis anterior
Origin of tibialis anterior
Upper half of lateral surface of tibia and interosseous membrane
Insertion of tibialis anterior
Base of 1st metatarsal bone
Insertion of peroneus terius
5th metatarsal bone
Main action of muscles of anterior compartment
Dorsiflextion
Tibialis anterior does ……….
And peroneus terius does ………..
Inversion - eversion
Muscles of posterior compartment divided into ………. and ………
Deep - superficial
Blood supply to the posterior compartment of the leg
Posterior tibial artery
Nerve supply to the posterior compartment of the leg
Tibial nerve
Muscles of posterior superficial (Calf) group of leg :
Gastrocnemius
Soleus
Plantaris
Origin of gastrocnemius
Lateral head > Lateral femoral condyle
Medial head > medial femoral condyle
Origin of plantaris
Lateral supracondylar line
Action of gastrocnemius and plantaris
Flextion of knee and plantar flextion
Origin of soleus
Head of fibula
Soleal line in tibia
Action of soleus muscles
Planter flextion
Peripheral heart
Insertion of muscles of the posterior superficial group
Into calcaneus via Tendo Calcaneus
Which tendon is the thickest and strongest tendon in body ?
Tendo calcaneus (Achilles tendon)
Muscles of Posterior deep group of leg :
Popliteus
Flexor hallucis longus
Flexor digitorum longus
Tibialis posterior
Origin of popliteus
Lateral femoral condyle
Insertion of popliteus
Upper posterior surface of tibia
Above soleal line
Action of popliteus
Flex the knee
Unlock the knee joint
Origin of Tibialis Posterior
Posterior surface of all
Insertion of posterior tibialis
Tarsal bones EXP talus
Base of middle 3 metatarsals
Origin of flexor digitorum longus
Posterior of tibia
Origin of flexor hallucis longus
Posterior of fibula
Damage to the tibial nerve causes
Loss of plantar flexion
Difficulty lift the heel
Shuffling gait