Transversus Abdominis Muscle

**Semantic type:** Anatomical Structure

**Definition:** An anterolateral muscle of the abdomen which attaches to the thoracolumbar fascia, iliac crest, inguinal ligament, and the costal cartilages of the lower ribs, and which continues anteriorly as the transverse abdominis aponeurosis, which inserts into the linea alba, the pubic crest, and the pectineal line.

**Synonyms:** - MUSCLE, TRANSVERSUS ABDOMINIS