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Leg - Anterior
Key actions of the anterior and lateral compartment muscles:
Dorsiflexion
pull the dorsal surface (aka, top) of your foot towards the anterior leg to demonstrate this action.
Plantar flexion
push the ventral surface (aka, sole) of your foot towards the posterior leg to demonstrate this action.
Eversion
turn the ventral surface of your foot to face laterally to demonstrate this action.
Inversion
turn the ventral surface of your foot to face medially (towards the midline of the body) to demonstrate this action.
Bones of the
Leg and Foot
Anterior compartment leg muscles:
Fibularis tertius
Originates on distal fibula and interosseous membrane
Inserts on the base of the 5th metatarsal;
Dorsiflexes and everts the foot.
Extensor digitorum longus
Originates on the lateral tibial condyle, the interosseous membrane, and, the proximal 2/3rds of the fibula
Inserts on the bases of the middle and distal phalanges of digits 2-5
Extends the toes and dorsiflexes and everts the foot.
Extensor hallucis longus
Originates on the middle of the anterior fibula and interosseous membrane
Inserts on the base of the distal phalanx of digit 1
Extends the big toe and dorsiflexes and inverts the foot.
Tibialis anterior
Originates on the lateral tibial condyle and the interosseous membrane
Inserts on the first cuneiform and first metatarsal
Dorsiflexes and inverts the foot.
Related Tutorials
Anterior and Lateral Leg - Details
Cross Section of the Leg
Bones of the Leg & Foot
Peroneal & Tibial Nerves - Advanced