(Module 4C) Anterior & Lateral Muscles of the Leg
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23 Terms
What are the 3 compartments of the leg?
Anterior, Lateral, Posterior
What is the primary action of the Anterior compartment in the leg?
Dorsiflexors
What nerve is within the Anterior component of the leg?
Deep fibular nerve
What is the primary action of the Lateral compartment in the leg?
Evertors
What nerve is within the Lateral compartment of the leg?
Superficial fibular nerve
What is the primary action of the Posterior compartment in the leg?
Plantar flexors
What nerve is within the Posterior compartment of the leg?
Tibial nerve
What are the 3 muscles of the Anterior compartment in the leg?
Tibialis Anterior, Extensor hallucis longus, Extensor digitorum longus
What is the general function of the Tibialis Anterior?
Dorsiflexes foot
What is the general function of the Extensor hallucis longus?
Extension of great toe
What is the general function of the Extensor digitorum longus?
Extension of digits 2-5
Which major nerve supplies each leg compartment?
Anterior -> deep fibular nerve
Lateral -> superficial fibular nerve
Posterior -> tibial nerve
What are the 2 muscles of the Lateral compartment in the leg?
Fibularis longus, Fibularis brevis
What is the general function of the Fibularis longus?
Eversion of foot
What is the general function of the Fibularis brevis?
Eversion of foot
What is the function of the Fibularis longus and Fibularis brevis?
Eversion of foot
What is compartment syndrome?
Increased pressure within a closed fascial compartment
What commonly causes compartment syndrome?
Commonly follows trauma or crush injury
Why is compartment syndrome dangerous?
Rising pressure can reduce blood flow and impair nerve function; can cause severe pain, weakness, and tissue damage
How can [acute] compartment syndrome be treated?
Fasciotomy to relieve pressure
What are shin splints?
Involves repetitive stress on tibialis anterior and the connective tissue covering the tibia (periosteum); produces pain and tenderness along the tibial border
How can shin splints develop?
Usually caused by repetitive overuse; common in runners and after sudden increases in activity
How can shin splints be improved?
Rest, activity modification, gradual return to normal activity