Advanced Coccygeus Quiz

Q1. Which attachment pattern most accurately describes the coccygeus muscle?

• Iliac crest to the greater trochanter
• Pubic body to the perineal body
• Ischial tuberosity to the femoral shaft
• Ischial spine and sacrospinous ligament to the lower sacrum and coccyx

Q2. Which feature most clearly distinguishes coccygeus from the levator ani muscles?

• Its attachment to the ischial spine and sacrospinous ligament
• Its location within the anterior abdominal wall
• Its origin from the lumbar vertebrae
• Its insertion into the femur

Q3. Damage to lower sacral motor fibers supplying coccygeus would most directly compromise which function?

• Support of the posterior pelvic floor
• Extension of the knee
• Plantar flexion of the ankle
• Flexion of the elbow

Q4. Why is coccygeus anatomically associated with the sacrospinous ligament?

• Both form the anterior abdominal wall
• They share the ischial spine region and follow closely related courses toward the sacrum and coccyx
• Both insert into the greater trochanter
• Both pass through the obturator canal

Q5. Contraction of coccygeus after posterior displacement of the coccyx would tend to produce which movement?

• Lateral rotation of the sacrum
• Superior displacement of the pubic symphysis
• External rotation of the femur
• Anterior movement of the coccyx

Q6. Which functional demand most directly recruits the supportive role of coccygeus as part of the pelvic diaphragm?

• Elevating the scapula
• Flexing the cervical spine
• Extending the hip during walking
• Resisting increased intra-abdominal pressure

Q7. Which anatomical description best explains how coccygeus contributes to continuity of the pelvic floor?

• It forms the anterior wall of the urinary bladder
• It bridges the anterior superior iliac spines
• It closes the obturator foramen
• It occupies the posterior region between levator ani and the sacrococcygeal area

Q8. A lesion affecting the anterior rami of S4 and S5 could directly weaken which pelvic muscle?

• Adductor longus
• Coccygeus
• Gluteus medius
• Rectus femoris

Q9. Which relationship is most useful for identifying coccygeus during dissection of the pelvic floor?

• Lateral to the femur and deep to the iliotibial tract
• Posterior to levator ani and over the pelvic surface of the sacrospinous ligament
• Within the inguinal canal beside the spermatic cord
• Anterior to the pubic symphysis and superficial to rectus abdominis

Q10. Which statement best integrates the anatomy and function of coccygeus?

• It forms the lateral thigh and abducts the hip
• It forms the pelvic inlet and extends the lumbar spine
• It forms part of the posterior pelvic diaphragm, supports pelvic viscera, and can draw the coccyx anteriorly
• It forms the anterior abdominal wall and flexes the trunk