Intermediate Rectus Abdominis Quiz

Q1. Which nerves provide the principal motor supply to rectus abdominis?

• Phrenic nerves only
• Femoral nerves
• Thoracoabdominal nerves from T6 through T12
• Vagus nerves

Q2. Which two arteries form an important longitudinal anastomosis within the rectus sheath?

• Renal and gonadal arteries
• External and internal pudendal arteries
• Superior and inferior epigastric arteries
• Superior and inferior mesenteric arteries

Q3. From which artery does the superior epigastric artery arise?

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

Q4. From which artery does the inferior epigastric artery arise?

• External iliac artery
• Common hepatic artery
• Internal thoracic artery
• Inferior mesenteric artery

Q5. Above the arcuate line, which aponeurosis passes entirely anterior to rectus abdominis?

• Transversus abdominis aponeurosis
• Transversalis fascia
• External oblique aponeurosis
• Posterior lamina of internal oblique

Q6. Above the arcuate line, what forms much of the posterior rectus sheath?

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

Q7. Below the arcuate line, where do the aponeuroses of the three flat abdominal muscles pass?

• Into the peritoneal cavity
• Anterior to rectus abdominis
• Through the muscle belly
• Posterior to rectus abdominis

Q8. What lies directly posterior to rectus abdominis below the arcuate line?

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

Q9. Why are tendinous intersections important to the surface appearance of rectus abdominis?

• They create the deep inguinal ring
• They form the inguinal ligament
• They attach the muscle to the femur
• They divide the muscle into visible segments

Q10. How does rectus abdominis contribute to forced expiration?

• It expands the lungs directly
• It closes the trachea
• It increases intra-abdominal pressure and assists diaphragmatic elevation
• It pulls the diaphragm inferiorly