The transversalis abdominis is a muscle located in the abdominal area. It is often referred to as the transverse abdominal muscle. Other synonyms for this muscle include the transverse abdominis plane muscle, the lateral abdominal muscle, or simply the TVA muscle. This muscle is responsible for providing support and stability to the trunk and can help to improve posture and prevent lower back pain. While the transversalis abdominis may go by different names, it is an important muscle for overall core strength and health. Exercises targeting this muscle can help to improve core strength and stability.