Anatomy study note · Pelvis

Obturator membrane

A fibrous sheet that almost closes the obturator foramen of the hip bone.

Key points

• Closes the obturator foramen except the obturator canal.
• Obturator nerve and vessels pass through the canal.
• Obturator internus arises from its pelvic surface.
• Connective tissue: from leftover mesenchyme.
• Dense CT: irregular (capsules) or regular (tendons, ligaments).

The full note in the atlas also covers

Features · Histology · Development

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 8, PDF p. 1022
• Inderbir Singh’s Human Embryology, ch. 7, PDF pp. 94–95
• BRS Cell Biology & Histology, 7th ed., ch. 6, PDF p. 110

More from the pelvis

• Obturator nerve
• Ovary
• Pelvic lymph nodes
• Piriformis
• Prostate
• Pubic symphysis
• Rectum
• Sacral plexus
• Sacrococcygeal joint
• Sacroiliac joint
• Sacrotuberous and sacrospinous ligaments
• Sacrum

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