Arcuate line of rectus sheath

Arcuate Line of Rectus Sheath

Arcuate line of rectus sheath, shown in red.

The Arcuate Line of Rectus Sheath is a horizontal line that marks the lower limit of the posterior wall of the Rectus Sheath. It is an important anatomical landmark in the abdomen and plays a significant role in abdominal surgeries.

Anatomy

The Arcuate Line is located approximately midway between the umbilicus and the pubic symphysis. Above this line, the Rectus Sheath is composed of the aponeuroses of the External Oblique, Internal Oblique, and Transversus Abdominis. Below the Arcuate Line, all three aponeuroses pass anterior to the Rectus Abdominis, leaving only the transversalis fascia posteriorly.

Clinical Significance

The Arcuate Line is a crucial landmark in abdominal surgeries, such as Hernia Repairs. Surgeons must be aware of its location to avoid injury to the underlying structures, including the inferior epigastric vessels.

See Also

• Linea Alba
• Semilunar Line
• Tendinous Intersection