Inferior Rectal Artery

Last revised by Assoc Prof Craig Hacking on 26 Aug 2021

The inferior rectal artery is an artery arising from the internal pudendal artery that supplies the lower anal canal including the external anal sphincter.

Summary

  • origin: from internal pudendal artery, just after it enters the pudendal canal
  • course: runs anteromedially through the ischioanal fossa to reach the deep portion of the external anal sphincter 
  • termination: divides into multiple branches to supply the muscles and integument of the lower anal region
  • anastomoses: with superior and middle rectal arteries and with contralateral inferior rectal artery branches

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Cases and figures

  • Figure1: branches of the IPA (Gray's illustrations)
    Drag here to reorder.
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