Anterior and Lateral Compartments of Leg Muscles Flashcards
Tibialis Anterior Insertion
- Medial and inferior surfaces of medial cuneiform
2. Base of 1st metatarsal
Tibialis Anterior Origin
- Lateral condyle
- Superior half of lateral surface of tibia
- Interosseous membrane
Tibialis Anterior Innervation
Deep Fibular Nerve (L4, L5)
Tibialis Anterior Action
Dorsiflexes ankle;
Inverts foot;
Supports medial longitudinal arch of foot
Extensor Hallucis Longus (EHL) Origin
Middle part of anterior surface of fibula and interosseous membrane
Extensor Hallucis Longus Insertion
Dorsal aspect of base of distal phalanx of great toe (hallux)
Extensor Hallucis Longus Innervation
Deep Fibular Nerve (L5, S1)
Extensor Hallucis Longus Action
Extends great toe;
Dorsiflexes ankle
Extensor Digitorum Longus (EDL) Origin
- lateral condyle of tibia
2. superior 3/4 of anterior surface of interosseous membrane
Extensor Digitorum Longus Insertion
Middle and distal phalanges of lateral four digits
Extensor Digitorum Longus Innervation
Deep Fibular Nerve (L5, S1)
Extensor Digitorum Longus Action
Extends lateral four digits;
Dorsiflexes ankle
Fibularis Tertius Origin
Inferior 1/3 of anterior surface of fibula and interosseous membrane
Fibularis Tertius Insertion
Dorsum of base of 5th metatarsal
Fibularis Tertius Innervation
Deep Fibular Nerve (L5, S1)
Fibularis Tertius Action
Dorsiflexes ankle;
Aids in eversion of foot
Fibularis Longus Origin
Head and superior 2/3 of lateral surface of fibula
Fibularis Longus Insertion
Base of 1st metatarsal and medial cuneiform
Fibularis Longus Innervation
Superficial Fibular Nerve (L5, S1, S2)
Fibularis Longus Action
Evert foot;
Weaky plantarflex ankle;
Supports transverse arch of foot
Fibularis Brevis Origin
Inferior 2/3 of lateral surface of fibula
Fibularis Brevis Insertion
Dorsal surface of tuberosity of base of 5th metatarsal
Fibularis Brevis Innervation
Superficial Fibular Nerve (L5, S1, S2)
