Transversus abdominis Transvers, -o (L). Transverse Abdom, =en, -in (L). The abdomen Origin: lateral third of inguinal ligament, inner lip of iliac crest, thoracolumbar fascia, inner surface of lower 6 ribs Insertion: Upper fibers to linea alba, lower fibers to pubis Action: Tenses abdominal wall, compresses abdominal contents, supports viscera Rectus abdominis Rect, -i, -o […]