Intermediate Rectus Sheath Quiz

Q1. Above the arcuate line, what forms the anterior wall of the rectus sheath?

• Transversalis fascia only
• Posterior internal oblique lamina only
• External oblique aponeurosis and anterior internal oblique lamina
• Parietal peritoneum

Q2. Above the arcuate line, what forms the posterior aponeurotic wall of the rectus sheath?

• Camper’s fascia and skin
• External oblique aponeurosis only
• Scarpa’s fascia only
• Posterior internal oblique lamina and transversus abdominis aponeurosis

Q3. How does the internal oblique aponeurosis behave above the arcuate line?

• It does not contribute to the sheath
• It passes entirely posterior at every level
• It passes entirely anterior at every level
• It splits around rectus abdominis

Q4. What lies directly posterior to rectus abdominis below the arcuate line?

• External oblique aponeurosis
• Skin
• Camper’s fascia
• Transversalis fascia

Q5. From which artery does the superior epigastric artery arise?

• Internal thoracic artery
• Femoral artery
• Inferior mesenteric artery
• External iliac artery

Q6. From which artery does the inferior epigastric artery arise?

• Celiac trunk
• Splenic artery
• External iliac artery
• Internal thoracic artery

Q7. Why is the superior-inferior epigastric anastomosis important?

• It supplies the spinal cord exclusively
• It forms the circle of Willis
• It connects internal thoracic and external iliac arterial territories
• It directly connects portal and systemic veins

Q8. How do thoracoabdominal nerves reach rectus abdominis?

• They enter through the femoral canal
• They enter the sheath laterally after traveling in the abdominal wall
• They pass through the obturator foramen
• They descend inside the aorta

Q9. What is the relationship of rectus abdominis tendinous intersections to the anterior sheath?

• They form the deep inguinal ring
• They attach only to the posterior sheath
• They adhere firmly to the anterior sheath
• They float freely without fascial attachment

Q10. Why does the rectus sheath vary in construction at different vertical levels?

• The abdominal wall has no fascia inferiorly
• The aponeurotic paths change with level
• Rectus abdominis changes into smooth muscle
• The linea alba ends at the umbilicus