Musculus transversus abdominis, commonly referred to as the Transverse Abdominis (TVA), is a deep layer of muscle located in the anterior (front) abdominal wall. It is part of a group of muscles known as the core muscles that play a crucial role in stabilizing and supporting the spine and pelvis.
The TVA muscle is located deep beneath the rectus abdominis (six-pack muscles) and the internal and external obliques, running horizontally across the abdomen. It spans from the lower ribs to the pubic bone, encircling the entire abdominal wall. Its unique orientation allows it to wrap around the abdomen like a corset.
The primary function of the musculus transversus abdominis is to compress and brace the abdominal contents, providing stability and support to the spine and pelvis. It acts as a natural weight belt, tightening the abdominal wall and creating intra-abdominal pressure, which aids in protecting the spine during movements, increasing trunk stability, and supporting proper posture.
Unlike the other abdominal muscles that contribute to movements like bending, twisting, or trunk rotation, the TVA primarily works to provide stability rather than generating significant force. It is often referred to as the body's internal girdle due to its role in reinforcing the abdominal wall and protecting vital organs.
Engaging and strengthening the musculus transversus abdominis is essential for core strength and stability, as well as injury prevention. It can be targeted and trained through specific exercises such as pelvic tilts, abdominal hollowing, and planks among others.
