Knee, Ankle, Foot Flashcards
3 extracapsular ligaments of the knee
Patellar tendon
Medial (tibial) collateral ligament
Lateral (fibular) collateral ligament
3 intracapsular ligaments of the knee
Anterior cruciate ligament
Posterior cruciate ligament
Function of ACL
prevents tibia from displacing anteriorly
Function of PCL
prevents tibia from displacing posteriorly
Why don’t the ACL and PCL heal well?
They are bathed in synovial fluid where it is avascular
What are the two menisci of the knee?
Medial meniscus
Lateral meniscus
What are the 3 bursae of the knee?
Prepatellar
Infrapatellar
Pes anserine
What is the most injured ligament in ankle sprains?
Anterior talofibular ligament
What are the lateral ligaments of the ankle?
Anterior talofibular
Calcaneofibular
Posterior talofibular
What are the medial ligaments of the ankle?
Deltoid ligament
What are the tibiofibular ligaments of the ankle?
Anterior tibiofibular
Posterior tibiofibular
Where can you feel the posterior tibial pulse?
Posterior and inferior to the medial malleolus
Where can you feel the dorsalis pedis pulse?
Lateral to the extensor hallicus longus tendon, distal to prominence of navicular bone
Incompetent valves in the veins
Venous insufficiency
Clots deep in the veins of the leg that can travel to the heart/lungs as a pulmonary embolism
Deep vein thrombosis
What are the risk factors for deep vein thrombosis?
Lower extremity surgery Immobility Hyper-coagulable states Malignancy Trauma Pregnancy/oral contraceptives (estrogen)
What are the compartments of the leg muscles separated by?
Intermuscular septa
Elevation of interstitial pressure (as little as 20-30 mmHg) in closed fascial compartment that results in microvascular compromise; can lead to ischemia of tissue
Compartment syndrome
What is the treatment for compartment syndrome?
Urgent fasciotomy and debrisment
What are the knee extensors that form the quadriceps?
Rectus femoris
Vastus lateralis
Vastus intermedius
Vastus medialis
Nerve supply for rectus femoris
Femoral nerve
Blood supply for rectus femoris
Femoral artery
Action for rectus femoris
Extension of knee
Flexion of hip
Nerve supply for vastus lateralis
Femoral nerve
Blood supply for vastus lateralis
Femoral artery
Action for vastus lateralis
Extension of knee
Nerve supply for vastus medialis
Femoral nerve
Blood supply for vastus medialis
Femoral artery
Action for vastus medialis
Extension of knee
Nerve supply for vastus intermedius
Femoral nerve
Blood supply for vastus intermedius
Femoral artery
Action for vastus intermedius
Extension of knee
What are the hip flexors?
Biceps femoris
Iliopsoas
Pectineus
Tensor fascia lata
Nerve supply to tensor fascia lata
Superior gluteal nerve