Tibialis Anterior: The tibialis anterior muscle is a long, narrow muscle in the anterior compartment of the lower leg. It is responsible for dorsiflexing and inverting the foot.
Origin: Originates in the upper two-thirds of the lateral(outside) surface of the tibia.
Insertion: Medial and plantar surfaces of 1st cuneiform and on the base of the first metatarsal
Function: Dorsiflexor of ankle joint and invertor of the foot
Nerve Supply: Deep peroneal nerve (L4, L5, S1)