Leg And Foot Flashcards
What is the function of the patella?
Increases mechanical advantage for quadriceps femoris during knee extension
What is the function of the LCL and MCL?
MCL: resist abduction
LCL: resists adduction
What is the function of the menisci?
They absorb shock, redistribute force
Does the LCL and lateral meniscus attach?
NO
Does the MCL and Medial meniscus attach?
YES
What is a popliteal synovial cyst?
Herniation of synovial membrane through knee joint
*Found between semimembranosus tendon and medial head of gastrocnemius
What are the cruciate ligaments within?
Within: joint capsule
Outside: synovial cavity
What is the function of the ACL?
Resist anterior displacement of the tibia on the femur
What is the function of the PCL?
Resist posterior displacement of the tibia on the femur
What is the unhappy triad?
Rupture of
1. Medial collateral ligament
2. Medial Meniscus
3. Anterior Cruciate ligament
How to test for a torn ACL?
Anterior Drawer sign
Where is the suprapetellar bursa found/
Above the patella, between the quad and femur
*continous with knee joint cavity
What is the sural nerve formed from?
Branches of the Tibial and Common Fibular Nerves
What creates the dorsal venous arch?
Anastomosis of great and small saphenous veins
What is the term for big toe?
Hallux
What is the nerve supply of the lateral compartment of the leg?
Superficial fibular nerve
What are the muscles of the lateral compartment of the leg?
Fibularis longus muscle
Fibularis brevis muscle
What is the origin and insertion of Fibularis longus?
O: Head of the Fibula
I: Medial cuneiform bone and base of 1st metatarsal
What is the origin and insertion of Fibularis brevis?
O: fibula
I: tuberosity of 5th metatarsal
What is the action of the lateral compartment of the leg?
A: plantarflexion and eversion
What is the function of the superior and inferior fibular retinacula?
Hold tendons down where they pass over a joint to prevent buckling
What does the common fibular nerve spilt into?
The superficial and deep fibular nerve
What innervates the anterior compartment of the leg?
The Deep Fibular nerve
What muscles form the anterior compartment of the leg?
Tibialis anterior
Extensor Hallucis longus
Extensor Digitorum longus
What is the origin of the anterior compartment of the leg?
O: upper lateral leg
What is the Insertion, and action of the tibialis anterior
I: medial cuneiform bone and base of 1st metatarsal
A: Dorsiflexion and inversion
What is the insertion and action of the extensor digitorum longus muscle
I: Extensor expansions of digits 2-5
A: Extension of digits 2-5
What is the insertion and action of the extensor hallucis longus?
I: Dorsal surface of distal phalanx of hallux
A: extension of big toe
What causes Bumper Neuropathy?
Trauma to common fibular nerve
*Weakness all dorsiflexors of posterior compartment
*Foot will plantarflex
What makes up the dorsum of the foot?
Extensor digitorum brevis
Extensor hallucis brevis
Extensor hallucis longus tendon
What is the Origin of the dorsum of the foot?
Tarsal bones
What is the insertion, and action of the extensor digitorum brevis?
I: Extensor expansion
A: Extension of digits 2-5
What is the insertion, and action of the extensor hallucis brevis?
I: proximal phalanx of hallux
A: extension of big toe
What is the nerve supply of the dorsum of the foot?
Superficial fibular nerve
*expect lateral part of big toe and medial part of 2nd toe
What muscles make up the posterior compartment of the leg?
Gastrocnemius
Soleus
Plantaris
Tibialis posterior
Flexor digitorum longus
Flexor hallucis longus
What is the nerve supply of the posterior compartment of the leg?
Tibial nerve
What is the origin, insertion, and action of the gastrocnemius?
O medial: Medial epicondyle of femur
O lateral: Lateral epicondyle of femur
I: calcaneus
A: Plantarflexion
What is the origin, insertion, and action of the soleus?
O: Head of fibula
I: Calcaneus
A: plantarflexion
What creates the triceps Surae?
Soleus and gastrocnemius
What is the origin, insertion, and action of the plantaris?
O: femur
I: calcaneus
A: plantarflexion
What is the tibial nerve between?
The deep and superficial group of the leg
What does the calcaneal reflex test?
S1
What muscles comprise the deep compartment of the leg?
- Flexor digitorum longus
- Flexor Hallucis longus
3.Tibialis posterior
What is the origin of the deep compartment of the leg?
Posterior leg
What is the Insertion, and action of the flexor digitorum longus muscle?
I: plantar surfaces of distal phalanges of digits 2-5
A: Flexion of toes 2-5
What is the insertion, and action of flexor hallucis longus muscle?
I: Plantar surface of distal phalanx of digit 1
A: flexion of big toe
What is the insertion, and action of the tibialis posterior muscle?
I: Plantar surfaces of navicular and cuneiform bones
A: plantarflexion and inversion
What does the tibial nerve supply?
- Gastrocnemius
- Soleus
- Plantaris
- Tibialis posterior
- flexor hallucis longus
- Flexor digitorum longus
When does the femoral artery and vein change their names?
When they pass through adductor hiatus
*change to popliteal artery and vein
Where does the anterior and posterior tibial arteries come from?
The popliteal artery
What binds the fibula and tibia together?
Interosseous membrane
When does the anterior tibial artery change its name?
When it passes over the ankle joint
*Change to Dorsalis Pedis Artery
Where can the posterior tibial artery pulse been found?
Behind the medial malleolus
What does the sural nerve supply?
Skin of lateral leg
What does the saphenous nerve supply?
Skin of the medial leg
What is the saphenous nerve a continuation of?
Femoral nerve
Where does the great saphenous vein pass?
Anterior to medial malleolus
Where does the small saphenous vein pass?
Posterior to lateral malleolus
What are the actions of the talocrual joint?
Dorsi flexion and plantarflexion
What are the actions of the subtalar joint?
Inversion and eversion
What does the posterior tibial artery give rise to?
Fibular artery
Of the flexor digitorum longus and flexor hallucis longus which muscle is medial and which is lateral (on the muscle belly)
Lateral: Flexor hallucis longus
Medial: Flexor digitorum longus
What creates the ankle “mortise”
Medial malleolus
Trochlear of the talus bone
What are the 4 parts of the medial collateral ligament of the ankle?
Posterior tibiotalar
Tibiocalcaneal
Tibionavicular
Anterior tibiotalar
How can the medial collateral ligament of the ankle be torn?
By forced eversion
What are the 3 parts of the lateral collateral ligament of the ankle?
Posterior talofibular ligament
Calcaneofibular ligament
Anterior talofibular ligament
How can the lateral collateral ligament of the ankle be torn?
By forced inversion
What nerve does the great saphenous vein run with?
Saphenous nerve (anterior side)
What nerve does the small saphenous vein run with?
Sural nerve (posterior side)