The linea semilunaris on the abdomen

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The linea semilunaris is a curved, lateral border of the rectus abdominis muscle. It is a visible groove that separates the outer edge of the rectus abdominis muscle from the lateral abdominal muscles, such as the external oblique muscle. In lean people, it can be a prominent feature on the abdomen. It does not represent tendinous insertions or the edge of the external oblique muscle. Appendicitis pain is typically located in the lower right quadrant of the abdomen, not along the linea semilunaris.

The Linea Semilunaris on the Abdomen