MusclePosterior abdominal wall
Iliacus
Latin: M. iliacus
Location: Abdomen
View the iliacus in 3DOrigin
Iliac fossa, iliac crest and sacral ala.
Insertion
Lesser trochanter with the psoas tendon.
Action
Flexes the hip with psoas — climbing stairs, sprinting, kicking; stabilises the hip in standing.
Nerve supply
Femoral nerve (L2–L4).
Blood supply
Iliolumbar and femoral arteries.
Clinical relevance
Iliacus haematoma after hip surgery compresses the femoral nerve in the iliac fossa — hip-flexion weakness with quadriceps palsy.
Educational anatomy reference, not medical advice. About this content.