Anterior leg compartment: dorsal flexion of foot

Question 1

tibialis anterior

Answer 1

• origin: lateral tibial condyle
• insertion: medial cuneiform and the base of 1st metatarsal
• action: dorsiflexes and inverts the foot

Question 2

extensor hallucis longus

Answer 2

• origin: anterior surface of the fibula
• insertion: base of the distal phalanx of the great toe (1.)
• action: extends the metatarsophalangeal and interphalangeal joints of the great toe

Question 3

extensor digitorum longus

Answer 3

• origin: lateral condyle of the tibia
• insertion: phalanges of lateral four toes
• action: extends the metatarsophalangeal and interphalangeal joints

Question 4

fibularis tertius

Answer 4

• origin: distal part of the anterior surface of the fibula
• insertion: dorsal base of 5th metatarsal
• action: eversion + dorsiflexion