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Inferior rectal artery

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Inferior rectal artery

Author: Gordana Sendic • Reviewer: Kevin Kuschel • Last reviewed: May 23, 2020

Inferior rectal artery (Arteria rectalis inferior)

The inferior rectal artery, also called the inferior hemorrhoidal artery or inferior anorectal artery, is a branch of the internal pudendal artery which supplies the rectum. It is found in the lesser pelvis, running medially across the ischioanal fossa towards the lower rectum.

Upon reaching the rectum, it splits into smaller branches which supply the anal canal, internal and external anal sphincter, as well as the perianal skin.

Key facts about the inferior rectal artery
Origin Internal pudendal artery
Branches Rectal branches
Supply Anal canal, internal and external anal sphincter, perianal skin

This article will discuss the anatomy and function of the inferior rectal artery.

Contents
  1. Course
  2. Branches and supply
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Course

The inferior rectal artery arises as the terminal branch of the internal pudendal artery, just as it pierces the wall of the pudendal canal. It runs inferiorly and medially across the ischioanal fossa towards the anal canal and splits into several terminal branches which are distributed to the muscles and integument of the anal region.

Branches and supply

The terminal branches of the inferior rectal artery form anastomoses with the superior and middle rectal arteries, as well as the perineal artery. The branches of the inferior rectal artery supply the anorectal junction, internal and external anal sphincters, the anal canal inferior to the pectinate line and the skin of the perianal region.

Rectum and anal canal Explore study unit

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Show references

References

  • Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Philadelphia, PA: Lippincott Williams & Wilkins.
  • Singh, V. (2011). Anatomy of abdomen and lower limb. London: Elsevier Health Sciences APAC.
  • Standring, S. (2016). Gray's Anatomy (41tst ed.). Edinburgh: Elsevier Churchill Livingstone.

Illustrators

  • Inferior rectal artery (arteria rectalis inferior) - Begoña Rodriguez
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