Greater, Lesser Sciatic Foramen

Enumerate the structures passing through the greater sciatic  foramen.

• Piriformis muscle
• Structures passing above the piriformis
  • Superior gluteal nerve
  • Superior gluteal vessels
• Structures passing below the piriformis
  • Inferior gluteal nerve
  • Inferior gluteal vessels
  • Sciatic nerve
  • Posterior cutaneous nerve of the thigh
  • Nerve to obturator internus
  • Nerve to quadrates femoris
  • Internal pudendal vessels
  • Pudendal nerve

Enumerate the structures passing through the lesser sciatic foramen.

• Tendon of obturator internus
• Nerve to obturator internus
• Internal pudendal vessels
• Pudendal nerve