The tibial nerve is one of the main nerves in the leg that originates from the sciatic nerve and runs down the back of the knee and into the foot. It plays a crucial role in the movement and sensation of the calf, heel, and toes. Synonyms for the tibial nerve include the medial plantar nerve, posterior tibial nerve, and internal plantar nerve. These terms are used interchangeably to describe the same nerve depending on the context of the discussion. Knowing these synonyms is important for medical professionals and individuals who are focusing on their leg health.