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Posterior Leg muscles
Origins, Insertions, Innervation, Action, and Blood Supply of the muscles of the posterior leg
35
Anatomy
Graduate
10/06/2011

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Term
Gastrocnemius: origin
Definition
lateral head: lat aspect of lat condyle of femur
medial head: popliteal surface and medial condyle of femur
Term
Gastrocnemius: insertion
Definition
posterior aspect of calcaneus via the calcaneal tendon
Term
Gastrocnemius: innervation
Definition
tibial n. (S1,S2)
Term
Gastrocnemius: action
Definition
plntarflexes the ankle joint, assists in flexion of the knee joint
Term
Gastrocnemius: blood supply
Definition
popliteal a.
Term
Soleus: origin
Definition
posterior aspect of head of fibula,
prox 1/4 of post fibula
soleal line of fibula
Term
Soleus: insertion
Definition
post aspect of calcaneus via the calcaneal tendon
Term
Soleus: innervation
Definition
tibial n. (S1,S2)
Term
Soleus: action
Definition
plantarflexes the ankle and stabilizes the leg over the foot
Term
Soleus: blood supply
Definition
posterior tibial a.,
fibular a.,
popliteal a.
Term
Plantaris: origin
Definition
popliteal surface of femur
Term
Plantaris: insertion
Definition
calcaneal tendon
Term
Plantaris: innervation
Definition
tibial n. (L5,S1)
Term
Plantaris: action
Definition
weakly assists gastrocnemius
Term
Plantaris: blood supply
Definition
popliteal a.
Term
Popliteus: origin
Definition
lateral aspect of lateral condyle of femur and
lateral meniscus
Term
Popliteus: insertion
Definition
post. tibia above soleal line
Term
Popliteus: innervation
Definition
tibial n. (L4-S1)
Term
Popliteus: action
Definition
medially rotates the knee
Term
Popliteus: blood supply
Definition
popliteal a.
Term
Flexor hallucis longus: origin
Definition
distal 2/3 of post. fibula
and inferior IO membrane
Term
Flexor hallucis longus: insertion
Definition
base of distal phalanx of great toe (toe 1)
Term
Flexor hallucis longus: innervation
Definition
tibial n. (L5-S2)
Term
Flexor hallucis longus: action
Definition
flexes toe 1, plntarflexes the ankle
Term
Flexor hallucis longus: blood supply
Definition
fibular a.
Term
Flexor digitorum longus: origin
Definition
medial part of posterior tibia inferior to soleal line
Term
Flexor digitorum longus: insertion
Definition
plantar bases of distal phalanges of lateral four toes
Term
Flexor digitorum longus: innervation
Definition
tibial n. (L5,S1)
Term
Flexor digitorum longus: action
Definition
flexes lateral four toes, plantarflexes ankle
Term
Flexor digitorum longus: blood supply
Definition
posterior tibial a.
Term
Tibialis posterior: origin
Definition
lateral part of posterior tibia,
IO membrane,
prox 1/2 of posterior fibula
Term
Tibialis posterior: insertion
Definition
tuberosity of navicular bone,
all cuneiforms,
cuboid,
bases of metatarsals II to IV
Term
Tibialis posterior: innervation
Definition
tibial n. (L5,S1)
Term
Tibialis posterior: action
Definition
plantarflexes the ankle and inverts the foot
Term
Tibialis posterior: blood supply
Definition
fibular a.
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