NEET PG Medical – 2016 – Question – 76
Anterior Rectus Sheath just above pubic symphysis is formed by ?
a) External Oblique Aponeurosis
b) The aponeurosis of three muscles including External Oblique, Internal Oblique, and Transversus Abdominis
c) Linea Alba
d) Internal Oblique only
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Correct Answer – B
Ans. is ‘B’ i.e., Aponeurosis of three muscles including External Oblique, Internal Oblique, and Transversus Abdominis
- The anterior wall just above the symphysis pubis (area below the arcuate line) → is formed by aponeurosis of all three muscles (external oblique, internal oblique, transversus abdominis).
- Three aponeurotic layers forming rectus sheath of both sides interlace with each other to form a tendinous raphe, Linea alba. It extends from the xiphoid process to pubic symphysis.
- Linea alba is narrow and indistinct below the umbilicus, as two recti lie in close contact. Linea alba broadens out above the level of the umbilicus.
