The rectus sheath is deficient posteriorly to the rectus abdominis muscle at the:Question 21Answera.Pubic symphysisb.Linea albac.Tendinous intersectionsd.Arcuate line
Question
The rectus sheath is deficient posteriorly to the rectus abdominis muscle at the:Question 21Answera.Pubic symphysisb.Linea albac.Tendinous intersectionsd.Arcuate line
Solution
The rectus sheath is deficient posteriorly to the rectus abdominis muscle at the:
d. Arcuate line
Explanation: The rectus sheath is a fibrous sheath formed by the aponeuroses of the abdominal muscles. It contains the rectus abdominis and pyramidalis muscles. The sheath is incomplete posteriorly at the level of the arcuate line, which is approximately located midway between the umbilicus and the pubic crest. Above the arcuate line, the sheath is formed by the aponeuroses of all three abdominal muscles (external oblique, internal oblique, and transversus abdominis), but below the arcuate line, all these aponeuroses pass anterior to the muscle, leaving it deficient posteriorly.
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