Anatomy of the extraneural blood supply to the intracranial oculomotor nerve (original) (raw)
Related papers
Angiosome territories of intracranial course of oculomotor nerve (III
Medica innovatica, 2024
Introduction: Angiosome is depicted as a region of a nerve supplied by an artery. The concept of the angiosome was originated from the Plastic and Reconstructive surgical fields to enhance the knowledge regarding the vascular anatomy of human body. Aim & objectives: To demonstrate Neurovascular supply of oculomotor nerve from brain stem till superior orbital fissure. Material & methods: The study procured forty-five adult human brains and their base of the heads from the Department of anatomy, Mamata medical college, Khammam. Results: The proximal part of the oculomotor nerve was supplied by the central branches of the Posterior Cerebral Artery, whereas the distal part was supplied by the cavernous part of the internal carotid artery. Conclusion: Although functioning of peripheral nerves is influenced by their vascular supply, cessation of the arterial supply to any part of a nerve affects the passage of nerve impulses and will ultimately induce a complete nerve block. This anatomical study may help in reducing the post surgical morbidity rates after surgery.
Facta Universitatis Series Medicine and Biology, 2014
The relationship between the initial part of the oculomotor nerve and the posterior cerebral and superior cerebellar arteries is well understood, but there is still insufficient data about details of these relationships. The aim of this work was to examine the relationships of the initial segment of the oculomotor nerve with adjacent arteries in fetal and adult period. The examination was performed on 259 human brains (191 adults and 68 fetuses). Arteries in fetal brain were perfused with Micropaque and examined by photo film. Adult cases were examined during the forensic autopsy and then basis of the brain was photographed. The close relationship of the initial segment of the oculomotor nerve with basilar artery in 8.3%, with superior cerebellar artery in 17.3%, with posterior cerebral artery in 68.6% of cases was noted. The root of the nerve appeared above postcommunicating part of the posterior cerebral artery in 1.3% of cases and under the level of superior cerebellar artery in 1.6% of cases. The oculomotor nerve with two roots was noted in 2.6% of cases. Neurovascular relationship between oculomotor nerve and adjacent arteries, as morphological characteristic on the ventral side of the brain trunk, has pathoanatomical meaning by the nerve disfunction caused by compression.
The blood supply of the hypoglossal nerve: The microsurgical anatomy of its cisternal segment
Surgical Neurology, 1997
While the characteristics of the vasculature of the second (intracanalicular) segment of the hypoglossal nerve are well known, the vascularization of the first (cisternal) segment of this nerve has not been examined so far. Many pathologic processes and malformations can be located in the premedullary cistern, which may affect the vasculature of the cisternal segment. Consequently, we decided to examine the blood supply of the cisternal segment. The anatomic features of the cisternal segment and its vasculature were examined in 15 hypoglossal nerves after injection of india ink and gelatin into the vertebrobasilar arterial system. The cisternal segment was noted to consist of 3-15 long roots, which usually formed two trunks of the hypoglossal nerve. The roots of each nerve received blood from the anterolateral and the lateral medullary arteries, which ranged from 3 to 5 in number and between 100 microns and 500 microns in caliber. These arteries may arise from the perforating branches or the pontomedullary branch of the basilar artery; the vertebral artery or its perforators; the anterior spinal artery or its vascular roots; the posterior spinal artery; and the posterior inferior cerebellar artery. The main hypoglossal arteries, which ranged in diameter from 20 microns to 80 microns, always coursed along the dorsal surface of the roots of the hypoglossal nerve. The cisternal segment of the hypoglossal nerve was always vascularized by several vessels, which mainly originated from the vertebral artery and its branches. This observation was discussed from the neurosurgical point of view.
БИОМЕДИЦИНСКА ИСТРАЖИВАЊА
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...
Cranial nerves: morphology and clinical relevance
The Anatomical Record, 2019
This Special Issue entitled "Cranial Nerves: phylogeny, ontogeny, morphology and clinical significance" has been divided into two consecutive volumes. This second volume is devoted to morphology and clinical relevance. Articles in this volume examine these topics from a macroscopic point of view and with a surgical interest. This volume includes articles on oculomotor nerves III, IV, and VI and their course in the orbit; intracranial and extracranial views of the V and VII pairs; and branching patterns of IX, X, XI, and XII pairs with medical significance. Together, these articles provide a general overview of cranial nerves' gross anatomical organization, as well as improving on the knowledge necessary for clinical approaches.
Blood supply of the trigeminal ganglion and nerve root
International Congress Series, 2003
Great surgical significance and lack of relevant anatomic data were the reasons for this study. Twenty-five trigeminal nerve roots and ganglia were examined under the stereoscopic microscope. The nerve root received between two and six vascular twigs from two or three of the following arteries: the superolateral pontine (92%), anterior inferior cerebellar (88%), inferolateral or posterolateral pontine, superior cerebellar, basilar and trigeminocerebellar. The trigeminal twigs measured from 110 to 520 Am in diameter. A single trigeminal artery may supply either the motor portion of the nerve root or the sensory portion, or both. The superolateral pontine artery (88%) usually perfused the motor root. The same artery often supplied (64%) the ophthalmic part of the sensory root. The maxillary part was most often irrigated by the superolateral and inferolateral pontine arteries, and the mandibular part by the anterior inferior cerebellar artery (AICA). The trigeminal ganglion received the vascular twigs from the middle meningeal artery (92%), accessory middle meningeal artery (8%), inferolateral trunk (90%) and tentorial branch (8%). The obtained data in the trigeminal vasculature can be the anatomic basis for decompressive neurovascular operations and surgery of the cavernous sinus.