GROSS ANATOMY
ABDOMINAL WALL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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External abdominal oblique
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Internal abdominal oblique
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External and internal abdominal oblique
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Internal oblique and transversus abdominis
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Detailed explanation-1: -Rectus Sheath The anterior wall is formed by the aponeuroses of the external oblique and half of the internal oblique. The posterior wall is formed by the aponeuroses of half of the internal oblique and transversus abdominis.
Detailed explanation-2: -The rectus sheath has an anterior and posterior wall. The walls are composed of a fusion of the aponeuroses of the external abdominal oblique, internal abdominal oblique, and transversus abdominis muscles.
Detailed explanation-3: -The rectus sheath is the durable, resilient, fibrous compartment that contains both the rectus abdominis muscle and the pyramidalis muscle. The fascial coverings of the external oblique, internal oblique, and transversus abdominis muscles comprise the rectus sheath.
Detailed explanation-4: -Below the arcuate line the anterior layer of the rectus sheath is built by the aponeuroses of all three lateral abdominal muscles whereas the posterior layer is only covered by the transverse fascia and the peritoneum.