Arcuate line

The arcuate line is situated at roughly one-third of the distance from the pubic crest to the umbilicus. It is the demarcation where the internal oblique and transversus abdominis aponeuroses of the rectus sheath start to pass anteriorly to the rectus abdominis muscle, leaving only the transversalis fascia posteriorly.

Superior to arcuate line, the aponeurosis of external oblique passes anterior to rectus abdominis, the aponeurosis of internal oblique splits around the rectus abdominis and the aponeurosis of transversus abdominis and transversalis fascia pass posteriorly

The inferior epigastric arteries enter the rectus sheath at the arcuate line.

Share article

Article information

rID: 47218
Section: Anatomy
Synonyms or Alternate Spellings:

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.