El ilíaco es un músculo de la pared abdominal posterior. Es un músculo en forma de abanico situado en la parte inferior de la pared abdominal posterior. Se une al músculo psoas mayor para formar el iliopsoas, el principal flexor del muslo en la articulación de la cadera. Inserciones: se origina en la superficie de la fosa ilíaca y en la espina ilíaca anterior inferior. Sus fibras se unen al tendón del músculo psoas mayor y se insertan en el trocánter menor del fémur. Acciones: flexión y rotación lateral del muslo en la articulación de la cadera. Inervación: nervio femoral (L2-L4). Irrigación sanguínea: arterias iliolumbar, circunfleja ilíaca profunda, obturadora y femoral. By TeachMeSeries Ltd (2026) Fig. 1: músculos de la pared abdominal posterior. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Pro Feature - Dissection Atlas The lumbar plexus, femoral nerve and muscles of the posterior abdominal wall. The lumbar plexus, femoral nerve and muscles of the posterior abdominal wall. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the iliacus muscle? The iliacus is a fan-shaped muscle located in the posterior abdominal wall. It plays a crucial role in forming the iliopsoas with the psoas major, serving as the primary flexor of the thigh at the hip joint. Where does the iliacus muscle originate and insert? The iliacus originates from the iliac fossa and the anterior inferior iliac spine. Its fibres converge with the psoas major tendon and insert into the lesser trochanter of the femur. What actions does the iliacus muscle perform? The iliacus muscle is responsible for flexing and laterally rotating the thigh at the hip joint. These movements are essential for various activities, including walking and running. Which nerve innervates the iliacus muscle? The iliacus muscle is innervated by the femoral nerve, which arises from spinal segments L2 to L4. This innervation is vital for muscle contraction and movement. What is the blood supply to the iliacus muscle? The iliacus muscle receives its blood supply from several arteries, including the iliolumbar, deep circumflex iliac, obturator, and femoral arteries. This vascularisation is essential for delivering nutrients and oxygen to the muscle. Rate This Article