* * What is the nerve and action of the fibularis tertius?
Deep fibular nerve; dorsiflexes AND everts foot (assists the lateral compartment)
* * What is the nerve and action of the tibialis anterior?
Deep fibular nerve; dorsiflexes AND inverts foot
* * Where do the branches of the common fibular nerve go?
Anterior branch goes DEEP into anterior compartment; Superficial branch stays in the lateral compartment
* * Describe the course of the anterior tibial artery
Supplies anterior compartment of leg; smaller branch of popliteal artery from lower border of popliteus muscle; passes through superior opening in interosseous membrane; descends accompanied by deep fibular nerve; becomes dorsalis pedis AT ANKLE
What are internal and external factors that could lead to compartment syndrome?
External: reduce size of compartment (e.g. cast, splint); Internal: increased volume within space (e.g. bleeding or fracture inflammation)
* * What is the path of the common fibular nerve?
Leaves popliteal fossa by crossing lateral head of the gastronemius muscle; becomes subcutaneous as it winds around NECK OF FIBULA; divides into superficial and deep branches within lateral compartment in substance of the fibularis longus muscle
* * What are the muscles of the anterior compartment of the leg?
tibialis major, extensor digitorum longus, extensor hallucis longus, and fibularis tertius
* Describe the path of the posterior tibial artery
Runs down with tibial nerve; passes posterior to medial malleolus; divides into medial and lateral plantar arteries that accompany corresponding nerves
* * What is the general action of the muscles of the anterior compartment?
Dorsiflexion; some evert or invert foot; some extend toes
What divides the compartments?
The intermuscular septa and the interosseus membrane between the tibia (medial) and fibula (lateral)
