An unusual presentation of tibialis anterior Introduction Tibialis

During a routine dissection in the teaching laboratory of the University of South Australia, the left leg of a male donor was found to have an additional muscle belly and tendon slip of tibialis anterior in the anterior compartment of the left leg, inserting onto the talus bone. The other muscular structures in the anterior compartment, the anterior tibial artery and the distal continuation of the deep fibular nerve followed the course described in standard textbooks.