![]() Tibialis posterior, flexor digitorum longus, and flexor hallucis longus What muscles belong to the deep layer of the posterior compartment of the leg? gastrocnemius and soleus What muscles belong to the superior layer of the posterior compartment of the leg? evert the foot What are the actions of the lateral compartment leg muscles? the lateral malleolus of the fibula (because of this these muscles are also weak plantar flexors of the foot) What bony feature do the lateral leg muscles pass posterior to? everts the foot (weak dorsi flexor of foot at the ankle-because it is anterior to the lateral malleolus) What are the actions of the fibulas tertius muscle? extends digits 2 to 5 assists in dorsiflexion of the foot at the ankle What are the actions of the extensor digitorum longus muscle? extends digit 1 (hallux/great toe) assists in dorsiflexion of the foot at the ankle What are the actions of the extensor hallucis longus? inverts the foot also powerful (primary) dorsiflexor of the foot (because it courses directly anterior to the medial malleolus) What are the actions of the tibialis anterior muscle? they all perform dorsiflexion because they are assisted by the extensor retinaculum What is the common action of all anterior compartment leg muscles? Why are these four muscles able to collectively perform this action? tibialis anterior muscle What is the primary dorsiflexor at the ankle? anterior thickening of the crural fascia of the leg courses from medial malleolus to lateral malleolus creates passageways for tendons of all muscles of anterior leg compartment Describe the extensor retinaculum.
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