Tibialis anterior is a muscle located in the front of the lower leg. This muscle is responsible for dorsiflexion and inversion of the foot. There are a few synonyms for the tibialis anterior muscle, such as anterior tibial muscle, TA muscle, tibialis anticus muscle, and front tibial muscle. The anterior tibial muscle is often used by medical professionals when referring to this muscle. The TA muscle is another common term when discussing the lower leg muscles during physical therapy or in anatomy textbooks. The tibialis anticus muscle and the front tibial muscle are both alternative terms that are used interchangeably.