Limbus fossae ovalis
Limbus fossae ovalis
- Synonym: Border of oval fossa; Limbus of fossa ovalis
- Latin eponym: Limbus Vieussensi
- Eponym: Vieussens
- Related terms: Limbus fossae ovalis; Border of oval fossa
Definition
The limbus fossæ ovalis (annulus ovalis) is the prominent oval margin of the fossa ovalis. It is most distinct above and at the sides of the fossa; below, it is deficient. A small slit-like valvular opening is occasionally found, at the upper margin of the fossa, leading upward beneath the limbus, into the left atrium; it is the remains of the fetal aperture between the two atria.
References
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
