Inferior epigastric artery

In human anatomy, inferior epigastric artery refers to the artery that arises from the external iliac artery and anastomoses with the superior epigastric artery. Along its course, it is accompanied by a similarly named vein, the inferior epigastric vein. These epigastric vessels form the lateral border of Hesselbach's triangle, which outlines the area through which direct inguinal hernias protrude.

Inferior epigastric artery
Right inferior epigastric artery - view from inside of abdomen. (Inferior epigastric vessels labeled at upper left.)
The abdominal inguinal ring. (Inf. epigastric artery labeled at center left.)
Details
Sourceexternal iliac artery
Branchescremasteric artery, pubic branch of inferior epigastric artery, artery of round ligament of uterus ♀
Veininferior epigastric vein
Identifiers
Latinarteria epigastrica inferior
TAA12.2.16.003
FMA20686
Anatomical terminology

Course

It arises from the external iliac artery, immediately above the inguinal ligament.

It curves forward in the subperitoneal tissue, and then ascends obliquely along the medial margin of the abdominal inguinal ring; continuing its course upward, it pierces the transversalis fascia, and, passing in front of the linea semicircularis, ascends between the Rectus abdominis and the posterior lamella of its sheath.

It finally divides into numerous branches, which anastomose, above the umbilicus, with the superior epigastric branch of the internal thoracic artery and with the lower intercostal arteries.

As the inferior epigastric artery passes obliquely upward from its origin it lies along the lower and medial margins of the abdominal inguinal ring, and behind the commencement of the spermatic cord.

The vas deferens, as it leaves the spermatic cord in the male, and the round ligament of the uterus in the female, winds around the lateral and posterior aspects of the artery.

Additional images
  • The interfoveolar ligament, seen from in front.
  • The internal mammary artery and its branches.
  • The arteries of the pelvis.
  • The iliac veins.
  • Dissection of side wall of pelvis showing sacral and pudendal plexuses.
  • Posterior view of the anterior abdominal wall in its lower half. The peritoneum is in place, and the various cords are shining through.
  • Front of abdomen, showing surface markings for arteries and inguinal canal.
  • Schema of the arteries arising from the external iliac and femoral arteries.
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See also
  • Terms for anatomical location
  • Hesselbach's triangle

References

This article incorporates text in the public domain from page 623 of the 20th edition of Gray's Anatomy (1918)

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