Introduction. The optic nerve is supplied by the arterial branches of thesuperficial pial plexus and direct intraneural branches. The aim of the studywas to study the morphological characteristics (origin, number of arteries,calibers, and branching pattern) of perioptic arterial vascularization andintraoptic vascular network of the extracranial sections of the optic nerve:canalicular and intraorbital.Methods. The study included 18 pairs of the optic nerves of both sexes(11 males and 7 females), aged 51 to 78 years, with no signs of changes inthe structures of the nervous system. The vasculature of the optic nerveswas microdissected and examined under the stereoscopic microscope, afterinjecting their arteries with 10% mixture of India ink and gelatin, and5% formaline fixation.Results. The intracanalicular part of the optic nerve received fine bloodvessels from the ophthalmic artery, usually in two branches in 29 (82.9%)cases, while in 6 (17.1%) specimens there was only one branch for thenerve. The intraorbital segment of the optic nerve was supplied by twointerconnected systems of blood vessels, peripheral and axial, both comingfrom the central retinal artery.Conclusion. On the basis of the obtained results, it has been confirmedthat both segments of the optic nerve have a rich and very delicate vascularnetwork. The superficial pial arterial plexus of the intracanalicular segmentof the optic nerve has been identified as the only source of its vascularsupply. The intraorbital part of the optic nerve has two interconnectedsystems of blood vessels: peripheral and axial.
Uvod: Lobanjski deo vidnog živca snabdevaju krvlju gornja hipofizealna i oftalmička arterija. Tradicionalni udžbenici anatomije ne opisuju vaskularizaciju ovog klinički veoma značajnog dela centalnog nervnog siatema. Cilj: Ispitivanje morfoloških karakteristika perioptičke arterijske vaskularizacije intrakranijalnog segmenta optičkog nerva. Materijal i metode: Proučavanje je obavljeno na nervima 18 celih mozgova osoba oba pola (11 muških i 7 ženskih), starosti od 51 do 78 godina, bez vidljivih promena na strukturama centralnog dela nervnog sistema. Arterijski krvni sudovi vidnih živaca su injicirani 10% mešavinom tuša i želatina, a po fiksiranju u 5% rastvoru formalina, sudovi su mikrodisekovani i proučavani pod stereo mikroskopom. Rezultati: Intrakranijalni segment vidnog živca bio je bogato vaskularizovan, kako sa ventralne tako i sa dorzalne strane i to isključivo penetrantnim granama koje polaze od pijalne arterijske mreže poreklom iz unutrašnje karotidne arterije i gornje hipofizealne arterije, za ventralnu stranu i grančica prednje moždane arterije za dorzalnu stranu. Zaključak: U skladu sa postavljenim ciljem, a na osnovu dobijenih rezultata utvrdili smo da lobanjski deo vidnog živca poseduje bogatu i vrlo osjetljivu vaskularnu mrežu. Ključne riječi: (vidni živac, arterije, perioptička vaskularizacija, lobanjski segment)
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