Inferior lateral flexure of rectum
Flexura lateralis inferior recti
- Latin synonym: Flexura inferodextra lateralis recti
- Synonym: Inferodextral lateral flexure of rectum
- Related terms: Inferodextral lateral flexure; Inferior lateral flexure
Definition
The inferior lateral flexure of rectum is the lowest of the three permanent lateral curvatures of the rectum. It is located in the lower part of the rectum, just above the anorectal junction, and is typically convex to the right. The flexure corresponds to the level of the inferior transverse rectal fold (inferior valve of Houston), which projects into the rectal lumen from the left lateral wall.
Functional correlates
Like the superior and intermediate lateral flexures, the inferior lateral flexure contributes to the characteristic zigzag course of the rectal lumen. Together with the associated transverse rectal fold, it helps support faecal contents within the rectum and reduces their direct descent into the anal canal. This arrangement facilitates temporary storage of faeces and contributes to the maintenance of faecal continence.
References
Standring, S. (2015) Grays Anatomy: The Anatomical Basis of Clinical Practice. 41st edn. London: Churchill Livingstone Elsevier. Chapter 66, Large intestine.
Omole AE, Mandiga P, Kahai P, et al. Anatomy, Abdomen and Pelvis: Large Intestine. [Updated 2025 Apr 6]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK470577/
