Beginner Rectus Sheath Quiz

Q1. What is the rectus sheath?

• A fascial compartment around psoas major
• A synovial sheath around the hip
• A peritoneal recess behind the liver
• An aponeurotic envelope around rectus abdominis

Q2. Which muscle is the principal structure enclosed by the rectus sheath?

• Quadratus lumborum
• External oblique
• Rectus abdominis
• Psoas major

Q3. Which three flat abdominal muscles contribute aponeuroses to the rectus sheath?

• Diaphragm, intercostals, and serratus posterior
• Rectus femoris, sartorius, and gracilis
• Psoas major, iliacus, and quadratus lumborum
• External oblique, internal oblique, and transversus abdominis

Q4. Which fibrous structure forms the medial boundary where the right and left rectus sheaths meet?

• Linea alba
• Thoracolumbar fascia
• Linea aspera
• Inguinal ligament

Q5. Which curved line corresponds to the lateral border of the rectus sheath?

• Linea semilunaris
• Arcuate line
• Linea aspera
• Pectineal line

Q6. What is the arcuate line?

• Inferior border of the diaphragm
• Inferior limit of the posterior aponeurotic rectus sheath
• Superior border of the inguinal ligament
• Medial edge of the iliac crest

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

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

Q8. Which small variable muscle may also lie within the inferior rectus sheath?

• Pectineus
• Piriformis
• Popliteus
• Pyramidalis

Q9. Which paired arteries run within the rectus sheath and supply rectus abdominis?

• Common and proper hepatic arteries
• Superior and inferior epigastric arteries
• Renal and gonadal arteries
• Superior and inferior mesenteric arteries

Q10. What is a major function of the rectus sheath?

• It forms the pelvic diaphragm
• It encloses the kidneys
• It encloses rectus abdominis and transmits abdominal wall tension
• It carries the spinal cord