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ORIGINAL RESEARCH article
Front. Neuroanat.
Volume 18 - 2024 |
doi: 10.3389/fnana.2024.1398858
Triangular Fossa of the Third Cerebral Ventriclean Original 3D Model and Morphometric Study
Provisionally accepted- Grigore T. Popa University of Medicine and Pharmacy, Iași, Iasi, Romania
Introduction. The triangular recess (TR), also called triangular fossa or vulva cerebri, represents the anterior extension of the diencephalic ventricle, located between the anterior columns of the fornix and the anterior white commissure. Over time, this structure of the third cerebral ventricle generated many disputes. While some anatomists support its presence, others have opposite opinions, considering that it only becomes visible under certain conditions. The aim of the study is to demonstrate the tangible structure of the triangular recess. Secondly, the quantitative analysis allowed us to establish an anatomical morphometric standard, as well as the deviations from the standard. Materials and Methods. Our study is both a quantitative and a qualitative evaluation of the triangular fossa. We dissected 100 non-neurological adult brains, which were fixed in 10% formaldehyde solution for 10 weeks. The samples are part of the collection of the Institute of Anatomy, "Grigore. T. Popa" University of Medicine and Pharmacy, Iasi. We highlighted the triangular fossa by performing dissections in two stages at the level of the roof of the III ventricle. Results. The qualitative analysis is a re-evaluation of the classical data concerning the anatomy of the fossa triangularis. We proposed an original 3D model of the triangular recess in which we described a superficial part called vestibule and a deep part called pars profunda. We measured the sides of the communication between the two proposed segments, as well as the communication with the III ventricle. By applying the Heron's formula, we calculated the area of the two communications. Statistical evaluations have shown that these communications are higher than they are wide. In addition, there is a statistical difference between the surfaces of the two communications: 34.07 mm 2 ±7.01 vs. 271.43 mm 2 ±46.36 (p=0.001). Conclusions. The outcome of our study is both qualitative and quantitative. Firstly, we demonstrated the existence of the triangular fossa and we conceived a spatial division of this structure. Secondly, the measurements carried out establish an anatomo-morphometric norm of the triangular recess, which is useful in assessing the degree of hydrocephalus during the third endoscopic ventriculoscopy.
Keywords: Triangular recess, ventriculoscopy, anterior commissure, Vestibulum, vulva cerebri, endoventricular navigation, Schwalbe's fossa, Third Ventricle
Received: 10 Mar 2024; Accepted: 12 Jul 2024.
Copyright: © 2024 Nedelcu, Lupu, Tepordei, Lupu, Ioniuc, Stan, Partene Vicoleanu, Haliciu, Statescu, Ursaru, Danielescu and Tarniceriu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Ancuta Lupu, Grigore T. Popa University of Medicine and Pharmacy, Iași, 700115, Iasi, Romania
Razvan T. Tepordei, Grigore T. Popa University of Medicine and Pharmacy, Iași, 700115, Iasi, Romania
Vasile Valeriu Lupu, Grigore T. Popa University of Medicine and Pharmacy, Iași, 700115, Iasi, Romania
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