Beginner Sacrum Quiz

Q1. How many vertebrae normally fuse to form the adult sacrum?

• Five
• Four
• Seven
• Three

Q2. Where is the sacrum located?

• Superior to the thoracic vertebrae
• Anterior to the pubic symphysis
• Between the two femora
• Between the two hip bones

Q3. Which vertebra articulates with the base of the sacrum?

• L5
• T12
• Co1
• L1

Q4. Which bone articulates with the apex of the sacrum?

• Pubis
• Ilium
• Coccyx
• Femur

Q5. What is the projecting anterior margin of the body of S1 called?

• Sacral hiatus
• Sacral cornu
• Median sacral crest
• Sacral promontory

Q6. How many pairs of anterior sacral foramina are normally present?

• Two pairs
• Five pairs
• Three pairs
• Four pairs

Q7. Which surface of the sacrum faces the pelvic cavity?

• Auricular surface
• Superior articular surface
• Pelvic surface
• Dorsal surface

Q8. Which surface of the sacrum is rough and convex?

• Pelvic surface
• Dorsal surface
• Anterior surface of S1 only
• Acetabular surface

Q9. Which part of the sacrum articulates with the ilium?

• Sacral promontory
• Sacral hiatus
• Auricular surface
• Median sacral crest

Q10. What structure continues inferiorly from the vertebral canal into the sacrum?

• Obturator canal
• Sacral canal
• Inguinal canal
• Femoral canal