The transversus abdominis muscle, also known as the transverse abdominus, transversalis muscle and transverse abdominal muscle, is a muscle layer of the anterior and lateral (front and side) abdominal wall which is deep to (layered below) the internal oblique muscle. It is thought to be a significant component of the core.
Read more about Transversus Abdominis Muscle: Structure, Variations, Exercise, Additional Images