Linea semilunaris

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Linea semilunaris
Gray392.png
The Obliquus externus abdominis. (Linea semilunaris labeled vertically at center, at border between brown and gray.)
Rectus abdominis.png
Linea semilunares are at lateral borders of rectus abdominis.
Identifiers
Gray'sp.417
TAA04.5.01.025
FMAFMA:19929
Anatomical terminology
 
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Not to be confused with Linea semicircularis.
Linea semilunaris
Gray392.png
The Obliquus externus abdominis. (Linea semilunaris labeled vertically at center, at border between brown and gray.)
Rectus abdominis.png
Linea semilunares are at lateral borders of rectus abdominis.
Identifiers
Gray'sp.417
TAA04.5.01.025
FMAFMA:19929
Anatomical terminology

The linea semilunaris (or Semilunar line) is a curved tendinous line found on either side of the rectus abdominis muscle.

Each corresponds with the lateral border of the rectus abdominis, extends from the cartilage of the ninth rib to the pubic tubercle, and is formed by the aponeurosis of the internal oblique at its line of division to enclose the rectus, reinforced anteriorly by the external oblique and posteriorly by the transversus abdominis above the arcuate line (aka Linea semicircularis)

A hernia through the linea semilunaris is called a Spigelian hernia, which is also referred to as a spontaneous lateral ventral hernia.

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