Anatomy study note · Abdomen

Iliacus

A fan-shaped muscle filling the iliac fossa. It joins the psoas tendon to form the iliopsoas.

Key points

• Iliac fossa → lesser trochanter (with psoas).
• Femoral nerve.
• Hip flexion (iliopsoas).
• Striated muscle: myotomes + local mesenchyme.
• Nerve supply indicates origin.
• Skeletal muscle: multinucleated, peripheral nuclei, striated.
• Epimysium → perimysium → endomysium.

The full note in the atlas also covers

Origin · Insertion · Action · Nerve supply · Histology · Development

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 6, PDF pp. 748–751
• Inderbir Singh’s Human Embryology, ch. 7, PDF pp. 92, 108–109
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the abdomen

• Iliohypogastric and ilioinguinal nerves
• Inferior epigastric vessels
• Inferior mesenteric artery
• Inferior vena cava
• Inguinal ligament
• Internal oblique
• Jejunum and ileum
• Kidney
• Large intestine
• Linea alba
• Liver
• Lumbar plexus

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