Description: The rectus abdominis m. are located medially in the anterior abdominal wall. They originate superiorly from the xiphoid process and costal cartilages 5-7 and insert onto the pubis and pubic symphysis distally. These muscles are divided transversely with 3-4 tendinous intersections, and they are wrapped by the rectus sheath. The circulation to the m. distally flows superiorly via the inferior epigastric a. at the lateral margin of the m. Innervation is from T8-L2 via the thoracoabdominal n.