anterior leg code Flashcards
What is the primary action of the muscles in the anterior compartment of the leg?
These muscles primarily act to dorsiflex and invert the foot.
Which nerve innervates the muscles in the anterior compartment of the leg?
The deep fibular nerve (L4-S2) innervates these muscles.
What artery supplies the muscles of the anterior compartment of the leg?
The anterior tibial artery provides the arterial supply.
Where is the tibialis anterior muscle located?
The tibialis anterior is located alongside the lateral surface of the tibia.
What are the actions of the tibialis anterior muscle?
The tibialis anterior dorsiflexes and inverts the foot.
Where does the tibialis anterior muscle insert?
It inserts into the medial cuneiform and the base of metatarsal I.
How is the tibialis anterior innervated?
The tibialis anterior is innervated by the deep fibular nerve.
Where is the extensor digitorum longus located?
The extensor digitorum longus lies laterally and deep to the tibialis anterior.
What are the actions of the extensor digitorum longus?
The extensor digitorum longus extends the lateral four toes and dorsiflexes the foot.
Where does the extensor digitorum longus originate?
It originates from the lateral condyle of the tibia and the medial surface of the fibula.
Where do the tendons of the extensor digitorum longus insert?
The tendons split into four and each inserts onto a toe.
How is the extensor digitorum longus innervated?
It is innervated by the deep fibular nerve.
Where is the extensor hallucis longus located?
The extensor hallucis longus is deep to the tibialis anterior and extensor digitorum longus.
What is the action of the extensor hallucis longus?
It extends the great toe and dorsiflexes the foot.
Where does the extensor hallucis longus insert?
It inserts on the base of the distal phalanx of the great toe.
How is the extensor hallucis longus innervated?
It is innervated by the deep fibular nerve.
What is the fibularis tertius muscle?
The fibularis tertius is a muscle that may arise from the distal part of the extensor digitorum longus.
Where does the fibularis tertius insert?
It inserts onto the fifth metatarsal.
How is the fibularis tertius innervated?
It is innervated by the deep fibular nerve.
What is footdrop?
Footdrop is the inability to dorsiflex the foot, resulting in the foot dragging during walking.
Which nerve damage is often associated with footdrop?
Footdrop often results from damage to the common fibular nerve.
How can a person with footdrop compensate for the condition?
A person with footdrop may flick their foot outwards while walking, known as an ‘eversion flick’.
