Overview of Pelvis

Question 1

What muscle splits the Greater Sciatic foramen?

Answer 1

Piriformis

Question 2

What muscle and ligament split the Greater Sciatic foramen and Lesser Sciatic foramen?

Answer 2

• Coccygeus

- Sacrospinous ligament

Question 3

What is the one structure pairing (n. and vessel) that passes through the Greater Sciatic foramen above the Piriformis?

Answer 3

Superior gluteal n. and vessels

Question 4

What is the one nerve and three structure pairings (n. and vessels) that passes through the Greater Sciatic foramen below the Piriformis?

Answer 4

• Sciatic n.
• Inferior gluteal n. and vessels
• Posterior femoral cutaneous n. and vessels
• Quadratus femoris n. and vessels

Question 5

What are the two nerves and one vessel pairing that enters through the Greater Sciatic foramen and exits through the Lesser Sciatic foramen?

Answer 5

• Pudendal n.
• N. for Obturator Internus
• Internal pudendal vessels

Question 6

What muscle passes through the Lesser Sciatic foramen to reach its insertion point (which is…)? What is the origin of this muscle?

Answer 6

Obturator Internus passes through the Lesser Sciatic foramen

• Origin: obturator membrane and surround bone
• Insertion: greater trochanter on femur