Flashcards in Compartments of Leg Deck (36):
The interosseus membrane contains two aperatures. What are they called, what do they convey, and where are they?
Aperature for anterior tibial vessels (carries anterior tibial vessels and is at superior end of interosseus membrane). Aperature for perforating branch of fibular artery (carries vessel of that name, is at inferior end of interosseus membrane)
Two branches of the popliteal artery
Anterior tibial and posterior tibial
Where does the posterior tibial artery run?
Between the superficial and deep muscles
Where do muscles in the lateral compartment of the leg get blood from?
Perforating branches off the fibular artery
What does the anterior tibial artery feed?
The anterior compartment of the leg
Where does the anterior tibial artery descend through the leg?
On the anterior surface of the interosseus membrane
What descends through the leg with the anterior tibial artery and where do they descend?
The deep fibular nerve. They descend on the anterior surface of the interosseus membrane
Where does the anterior tibial artery cross the ankle and what is it called after this point?
Midway between lateral and medial malleoulus. It becomes the dorsalis pedis artery at this point
What does the posterior tibial artery supply?
Posterior and lateral compartments of the leg, and the foot
The tarsal tunnel runs directly behind what structure?
The medial malleolus
What supplies the muscles of the posterior compartment of the leg?
The tibial nerve
What does the tibial nerve supply and what nerve is this a branch of?
Supplies all muscles in posterior compartment of leg, is a branch of sciatic nerve
What structures does the common fibular nerve supply?
Muscles of the anterior and lateral compartments of leg
What supplies the muscles of the anterior and lateral compartments of the leg?
The common fibular nerve
What are the superficial muscles supplied by the tibial nerve?
Gastrocnemius, plantaris, soleus
What innervates the muscles of the anterior compartment of the leg?
Deep fibular nerve (from the common fibular nerve)
What are the muscles of the anterior compartment of the leg?
Tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius
What are the muscles of the lateral compartment of the leg?
Fibularus longus, fibularis brevis
What innervates the muscles of the lateral compartment of the leg?
Superficial fibular nerve (from common fibular nerve)
What are the branches of the common fibular nerve?
Deep fibular nerve, superficial fibular nerve
What is turning the ankle inward called?
What is turning the ankle outward called?
What do muscles of the anterior compartment of the leg do?
Dorsiflexors of the foot and toes
What do muscles of the lateral compartment of the leg do?
Elevators of the foot (e.g. eversion)
What do muscles of the posterior compartment of the leg do?
Plantar flexors of foot and toes
The fibularis longus helps support what structure?
The lateral arch of the foot
What injury might cause a muscle of the lateral leg to come off its attachment site, and which muscle?
Inversion ankle sprains can cause fibularis brevis to come off its attachment site (tubercle of 5th metatarsal)
Where is fibularis brevis relative to fibularis longus?
Where does the superior fibular retinaculum run from and to?
Lateral malleolus to calcaneus
Activities involving lateral leg muscles
Ankle eversion, ankle stabilization
Activities involving anterior leg muscles
Ankle dorsiflexion, walking, resisted movement
What type of injury is a shin splint?
Strain of tibialis anterior
Where are the popliteal vessels (including nerve) relative to the popliteus muscle?
Posterior to the muscle
Order of the structures of the deep posterior leg from medial to lateral
Flexor digitorum longus, tibialis posterior, flexor hallucis longus
What are the types of muscle contractions and briefly describe each in terms of the barbell example
Concentric (lift a barbell), eccenteric (slowly lower a barbell), isometric (hold a barbell steady)