Anatomy study note · Lower limb

Pectineus

A flat muscle in the floor of the femoral triangle.

Key points

• Superior pubic ramus → upper linea aspera.
• Femoral nerve (± obturator).
• Flexion + adduction; floor of the femoral triangle.
• Limb muscles: in situ from limb-bud mesenchyme.
• Upper limb bud C4–T2; lower limb bud L2–S2.
• 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. 11, PDF pp. 1301–1302, 1308–1309
• Inderbir Singh’s Human Embryology, ch. 7, PDF p. 109; ch. 10, PDF pp. 142–145
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the lower limb

• Phalanges of the foot
• Plantar aponeurosis
• Plantar arteries
• Plantar nerves
• Plantaris
• Popliteal artery
• Popliteal lymph nodes
• Popliteal vein
• Popliteus
• Posterior cutaneous nerve of the thigh
• Posterior tibial artery
• Profunda femoris artery

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