Intermediate Sacroiliac Joint Quiz

Q1. What type of cartilage covers the sacral auricular surface of the sacroiliac joint?

• Elastic cartilage
• Hyaline cartilage
• Fibrocartilage only
• No cartilage

Q2. What type of cartilage predominantly covers the iliac auricular surface?

• Calcified tendon
• Fibrocartilage
• Elastic cartilage
• Hyaline cartilage exclusively

Q3. Which ligament occupies the space between the sacral and iliac tuberosities?

• Superior pubic ligament
• Anterior longitudinal ligament
• Sacrotuberous ligament
• Interosseous sacroiliac ligament

Q4. What is nutation of the sacrum?

• Lateral displacement of the entire sacrum
• Anterior movement of the coccyx with no sacral movement
• Rotation of the femoral head
• Anterior and inferior movement of the sacral promontory

Q5. What is counternutation of the sacrum?

• Rotation of the ilium around the femur
• Anterior and inferior movement of the promontory
• Posterior and superior movement of the sacral promontory
• Complete separation of the sacrum from the ilium

Q6. Why are the irregular articular surfaces of the sacroiliac joint mechanically useful?

• They reduce all contact between the bones
• They permit unrestricted rotation
• They increase friction and joint stability
• They create a large meniscal cavity

Q7. Which two ligaments help limit sacral nutation?

• Inguinal and lacunar ligaments
• Sacrotuberous and sacrospinous ligaments
• Superior and inferior pubic ligaments
• Iliofemoral and pubofemoral ligaments

Q8. How is body weight transmitted through the sacroiliac joints during standing?

• From the sacrum directly to the pubic symphysis only
• From the sacrum to the ilia and then toward the lower limbs
• From the femora directly to the lumbar spine without the pelvis
• From the coccyx directly to the femora

Q9. Why does the sacroiliac joint favor stability over mobility?

• It lacks all ligamentous support
• Strong ligaments and irregular surfaces restrict excessive movement
• It is designed primarily for circumduction
• It has a spherical femoral head

Q10. Which statement best describes the structural organization of the sacroiliac articulation?

• It consists only of a fibrocartilaginous disc
• It is entirely a ball and socket joint
• It combines an anterior synovial component with strong posterior ligamentous connections
• It is a simple fibrous suture throughout