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L15: Rectus Sheath Anatomy
8 Questions
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L15: Rectus Sheath Anatomy

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Questions and Answers

What is the transition point between the upper and lower parts of the rectus sheath?

  • Costal margin
  • Umbilicus
  • Pubic symphysis
  • Arcuate line (correct)

    • What muscles are enclosed within the rectus sheath?

  • Psoas and iliacus
  • External oblique and internal oblique
  • Transversus abdominis and internal oblique
  • Rectus abdominis and pyramidalis (correct)

    • What is the composition of the anterior wall of the rectus sheath above the costal margin?

  • The aponeurosis of all three flat abdominal muscles
  • Only the aponeurosis of the internal oblique
  • Only the aponeurosis of the external oblique (correct)
  • The aponeurosis of the transversus abdominis

    • What is the composition of the posterior wall of the rectus sheath above the costal margin?

    <p>Deficient, so the rectus muscle rests on the 5th, 6th, and 7th costal cartilages</p> Signup and view all the answers

    What is the composition of the anterior wall of the rectus sheath between the costal margin and the arcuate line?

    <p>The aponeurosis of the external oblique and the anterior lamina of the internal oblique aponeurosis</p> Signup and view all the answers

    What is the composition of the posterior wall of the rectus sheath between the costal margin and the arcuate line?

    <p>The aponeurosis of the internal oblique and transversus abdominis</p> Signup and view all the answers

    What is the composition of the anterior wall of the rectus sheath below the arcuate line?

    <p>The aponeurosis of all three flat abdominal muscles</p> Signup and view all the answers

    What is the composition of the posterior wall of the rectus sheath below the arcuate line?

    <p>The transversalis fascia and peritoneum</p> Signup and view all the answers

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