Unit:
Κατεύθυνση Χειρουργική ΑνατομίαLibrary of the School of Health Sciences
Author:
Koutsarnakis Christos
Supervisors info:
Π. Σκανδαλάκης, Καθηγητής, Ιατρική, ΕΚΠΑ
Θ.Τρουπής, Αν.Καθηγητής, Ιατρική, ΕΚΠΑ
Α.Μαζαράκης, Αν.Καθηγητής, Ιατρική, ΕΚΠΑ
Original Title:
Η τοπογραφική ανατομική των ινών της οπτικής ακτινοβολίας σε σχέση με την οροφή και το έδαφος του τριγώνου της πλάγιας κοιλίας
Translated title:
The topographic anatomy of the optic radiation fibers in relation to the roof and floor of the ventricular trigone.
Summary:
Objective: To investigate the specific topographic relationship of the optic radiation fibers to the roof and floor of the ventricular atrium since current literature is ambiguous.
Materials and Methods: Thirty five (35) normal, adult, formalin fixed cerebral hemispheres and thirty (30) focused MRI cuts at the level of the atrium were included in the study. The correlative anatomy of the optic radiation with regard to the atrial roof and floor was investigated in fifteen specimens (15) respectively, through focused fiber microdissections. The remaining five (5) hemispheres were explored with particular emphasis placed on the trajectory of the collateral sulcus in relation to the floor of the atrium. Additionally, the trajectory of the collateral sulcus was evaluated in thirty different (30) MRI scans.
Results: The atrial roof was observed to be devoid of optic radiations in all studied hemispheres whereas the atrial floor was seen to harbor optic fibers on its lateral part. Moreover, the trajectory of the intraparietal sulcus, when followed, was always seen to correspond to the roof of the atrium thus avoiding the optic pathway, while that of the collateral sulcus was found to lead either to the lateral atrial floor or outside the ventricle in 88% of cases, therefore risking injury to the visual pathway.
Conclusion: Operative corridors accessing the ventricular atrium should be carefully tailored through detailed preoperative planning and effective use of intraoperative navigation so as to increase patient’s safety and enhance surgeon’s maneuverability. The significance of accurate anatomical knowledge is again strongly emphasized.
Main subject category:
Health Sciences
Keywords:
Brain, Anatomy, White matter, Optic radiation, Ventricular system
