Rectus Abdominis Muscle, Anterior View

Description

Centered on the anterior abdominal wall, the paired rectus abdominis muscles run vertically from the pubic crest and pubic symphysis inferiorly to the xiphoid process and costal cartilages of ribs 5 to 7 superiorly. Transverse tendinous intersections segment each muscle belly, lying superficial to the anterior layer of the rectus sheath and separated at the midline by the linea alba. Laterally, the rectus borders approach the semilunar lines where the aponeuroses of external oblique, internal oblique, and transversus abdominis contribute to the sheath. Skeletal landmarks frame the field. This anterior presentation matters because it ties muscle form to the surgical and clinical map of the abdomen: the linea alba is a standard midline entry for laparotomy, while the rectus sheath and its arcuate line govern tissue layers you encounter when placing trocars or closing fascia. Contraction patterns across the tendinous intersections help explain why partial tears and hematomas may localize to a segment, and why rectus sheath hematoma can mimic acute intraabdominal pain, often after anticoagulation or vigorous coughing. Clear midline and lateral borders also support teaching diastasis recti, where the rectus bellies drift laterally as the linea alba widens. Use this artwork in gross anatomy and kinesiology instruction to correlate surface anatomy with bony landmarks, or in general surgery and sports medicine texts discussing abdominal incisions, hernia evaluation, and core muscle injuries. It also suits patient-facing education on abdominal wall anatomy when paired with procedural diagrams. Anatomical accuracy verified by SciePro's Medical Advisory Board.