Posterior Leg Flashcards
The groove for the flexor hallucis longus tendon is made by what?
medial and lateral tubercle of the talus
What is the sustentaculum tali?
shelf-like projection that supports talus and provides groove for Flexor Hallucis Longus
What attaches on the navicular tuberosity?
tibialis posterior
What are the septa of the leg?
- Anterior
- Lateral
- Deep Posterior (fibula here)
- Superficial Posterior
**Each septa share same general function, nerve, artery, and vein**
What is the function and innervation of the anterior compartment of the thigh?
Extension at knee
femoral nerve
What is the function and innervation of the medial compartment of the thigh?
Adduction at hip
Obturator nerve
What is the function and innervation of the posterior compartment of the thigh?
Flexion at knee
Sciatic nerve
What muscles are in superficial posterior group?
- gastrocnemius
- soleus
- plantaris
what muscles are in the deep posterior group of the leg?
popliteus
flexor hallucis longus
flexor digitorum longus
tibialis posterior
What is the function and innervation of the gastrocnemius?
Function
- plantar flexion and flexes leg at knee joint
Innervation
- Tibial Nerve
What is a Fabella?
sesamoid bone in the lateral head of gastrocnemius. can be fractured in total knee replacement.
What is the function and innervation of the Soleus muscle?
Function
- plantar flexion
Innervation
- Tibial Nerve
**froms calf prominence**
What is the function and innervation of plantaris muscle?
Function
- proprioceptive organ for foot position
Innervation
- tibial nerve
What tendon is commonly used in reconstructive surgery?
Plantaris tendon
What muscle may be ruptured during violent ankle movements? (ie sudden dorsiflexion of ankle joint)
Plantaris Muscle!
What is the function and innervation of the popliteus muscle?
function
- unlocks extended leg by laterally rotating femur on a stationary tibia
- weakly flexes leg
Innervation
- tibial nerve
What artery pierces the oblique popliteal ligament and vascularizes the knee?
middle genicular artery
What are the functions and innervation of the flexor hallicus longus?
Function
- flexes great toe
- plantarflex foot at ankle joint
Innervation
- Tibial Nerve
What is the function and innervation of Flexor Digitorum Longus?
Function
- Flexes lateral four digits
- plantarflex foot at ankle joint
What is the function and innervation of tibialis posterior?
Function
- inversion
- plantar flexion
innervation
- Tibial Nerve
What is the innervation and artery supply of the posterio compartment of the leg?
Tibial Nerve
Posterior Tibial Artery
What does the tibial nerve terminate as?
the medial and lateral plantar nerves
What branches off of the posterior tibial artery?
Fibular artery
What does the posterior tibial artery terminate as?
medial and lateral plantar arteries
Where does the fibular artery run, what does it supply, and where does it terminate?
1) Descends obliquely toward fibula, under FHL
2) posterior and lateral comparmens
3) Pierces interosseous membrane and anastomosing with anterior lateral malleolar artery
