Transversus

Transversus abdominis muscle (or transversalis 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 by most fitness instructors to be a significant component of the core.

Structure

The transversus abdominis muscle is located deep within the abdomen, underneath the oblique muscles. It is the deepest layer of the abdominal muscles, and it wraps around the abdomen between the lower ribs and the pelvis, functioning like a corset.

The muscle originates at the iliac crest, the inguinal ligament, the thoracolumbar fascia and the inner surface of the lower six ribs. It inserts into the xiphoid process, the linea alba, and the pubic crest and pubic tubercle.

Function

The transversus abdominis helps to compress the ribs and viscera, providing thoracic and pelvic stability. The muscle has no actions on the spine unlike the internal oblique and external oblique muscles. The transversus abdominis also helps pregnant women deliver their child.

Clinical significance

The transversus abdominis muscle plays a crucial role in maintaining good posture and is important for athletic performance. It is often targeted in physical therapy for those with back pain, and is a focus in the recovery process after abdominal surgery or pregnancy.

See also

• Abdominal exercise
• Rectus abdominis muscle
• Internal oblique muscle
• External oblique muscle

External links

• Healthline: Transversus abdominis muscle

Transversus Resources
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