Tibialis Anterior

Origin: Lat. condyle and sup. 1/2 of lat. surface of tibia and IM.

Insertion: Med. and inf. surfaces of med. cuneiform and base of 1st metatarsal.

Action: Dorsiflexion and inversion.

Innervation: Deep fibular (peroneal) n. (L4, L5).

Blood: Ant tibial a.

Extensor Hallucis Longus

Origin: Middle part of ant. surface of fibula and IM.

Insertion: Dorsal aspect of base of distal phalanx of great toe (hallux).

Action: Extension of great toe and dorsiflexion.

Innervation: Deep fibular (peroneal) n. (L4, L5).

Blood: Anterior tibial a.

Extensor Digitorum Longus

Origin: Lat. condyle of tibia and sup. 3/4 of med. surface of fibula and IM.

Insertion: Middle and distal phalanges of lat. 4 digits.

Action: Extension of lat. 4 digits and dorsiflexion.

Innervation: Deep fibular n. (L4, L5).

Blood: Anterior tibial a.

Fibularis Tertius

Origin: Inf. 1/3 of ant. surface of fibula and IM.

Insertion: Dorsum of base of 5th metatarsal.

Action: Dorsiflexion and aids in eversion.

Innervation: Deep fibular n. (L4, L5).

Blood: Anterior tibial a.