Intermediate Coccyx Quiz

Q1. Which coccygeal vertebra is usually the largest and most developed?

• Co3
• Co2
• Co1
• Co4

Q2. Which coccygeal vertebra bears the coccygeal cornua?

• Co3
• Co2 only
• Co4
• Co1

Q3. What type of joint is the sacrococcygeal joint primarily classified as?

• Secondary cartilaginous joint
• Ball and socket synovial joint
• Pivot synovial joint
• Fibrous suture

Q4. Which ligament connects the lateral margin of the sacrum to the transverse process of Co1?

• Superior pubic ligament
• Inguinal ligament
• Iliolumbar ligament
• Lateral sacrococcygeal ligament

Q5. The posterior sacrococcygeal ligaments are comparable to continuations of which vertebral ligaments?

• Ligaments of the shoulder joint
• Annular ligament of the radius
• Collateral ligaments of the knee
• Ligaments associated with the posterior vertebral column and canal

Q6. Which muscle lies on the posterior pelvic wall and attaches partly to the coccyx?

• Coccygeus
• Pectineus
• Obturator externus
• Rectus abdominis

Q7. Which ligament has an attachment to the lateral margins of the coccyx?

• Transverse acetabular ligament
• Iliofemoral ligament
• Sacrospinous ligament
• Inguinal ligament

Q8. Which ligament also has broad attachments involving the coccyx and sacrum?

• Sacrotuberous ligament
• Inguinal ligament
• Patellar ligament
• Pubofemoral ligament

Q9. Why can the coccyx move slightly at the sacrococcygeal joint?

• The coccyx has no connection with the sacrum
• It is a freely mobile ball and socket joint
• The coccyx rotates freely around the sacrum
• The sacrococcygeal articulation permits limited flexion and extension

Q10. Which statement best describes the shape of the coccyx?

• A long cylindrical bone
• A triangular bone with a superior base and inferior apex
• A flat circular bone
• A ring-shaped bone surrounding the rectum