Compressive optic nerve lesions at the optic canal

pathogenesis, diagnosis, treatment by R. UnsoМ€ld

Publisher: Springer-Verlag in Berlin, New York

Written in English
Published: Pages: 138 Downloads: 597
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Subjects:

  • Optic nerve -- Wounds and injuries.,
  • Nerve Compression Syndromes.,
  • Optic Nerve -- pathology.

Edition Notes

StatementRenate Unsöld, Wolfgang Seeger ; collaborators, M. Bach ... [et al.].
ContributionsSeeger, Wolfgang, 1929-, Bach, M., Hoyt, William Fletcher, 1926-
Classifications
LC ClassificationsRC410 .U57 1989
The Physical Object
Paginationx, 138 p. :
Number of Pages138
ID Numbers
Open LibraryOL2059088M
ISBN 10038718838X
LC Control Number88038332

apparentely the optic nerve goes from the eye all the way back to the brain and you may have inflamation anywhere along the optic nerve. When the inflamation is on the portion of the optic nerve that can be seen by the opthalmologist then it is called ON. But when it is behind the eye toward the brain it is called Retoubular Neuritis. Computer reformation of the brain and skull base: anatomy and clin. application / R. Unsöld. by Unsöld, Renate (Herausgeber) and a great selection of related books, art and collectibles available now at . The optic nerve of such patients tend to be smaller than normal, and the optic canal, the bony canal through which the optic nerve passes, narrower than normal. Such an optic nerve is said to be 'nerve at risk' or a 'crowded' disc'. In a patient when the condition is brought on by a drop in blood pressure, there should be no further episodes. The optic nerve is the second cranial nerve which, along with the olfactory nerve (CN I), is really an extension of the central nervous is not surrounded by Schwann cells with the first sensory bipolar cell body located peripherally in the central processes synapse on ganglion cells on the vitreous surface of the retina and their central processes pass via the optic disc.

This book presents the salient features of optic nerve disorders, enc- passing optic neuritis, papilledema, ischemic optic neuropathies, c- pressive and in? ltrative optic neuropathies, traumatic optic neuropathies, nutritional and toxic optic neuropathies, hereditary optic neuropathies, and optic disc tumors. Chapters 1 to 9 outline key clinical aspects of each of these disorders.   Optic nerve: The optic nerve being a portion of central nervous system is a tract, and not really a nerve. However, as a convention the million axons that derive from the retinal ganglion cells carry the name optic nerve, until they partially decussate at the optic chiasm. Wednesday, Octo Department of Ophthalmology, JNMC 3 4. ADRIAN TOMINE was born in in Sacramento, California. He began self-publishing his comic book series Optic Nerve. His comics have been anthologized in publications such as McSweeneys, Best American Comics, and Best American Nonrequired Reading, and his graphic novel "Shortcomings" was a New York Times Notable Book of /5(4). sections perpendicular to the longitudinal axis of the optic canal (Advantage Windows , GE Medical Systems) (Fig. 1). The di-mensions of the optic waist were measured with digital calipers on the reformatted images; the area of the optic canal was calculated (half the height in millimeters¬half the width in millimeters¬ p).

The optic nerve begins at the optic disk, a structure that is mm ( inch) in diameter and is located at the back of the eye. The optic disk forms from the convergence of ganglion cell output fibres (called axons) as they pass out of the eye. When the nerve emerges from the back of the eye, it.   All postchiasmal lesions of the visual pathway (with one small exception) are characterized by homonymous visual field defects. The optic tract, about 20 to 30 mm in length, is comparatively well vascularized. It is not commonly affected by traumatic or space-occupying processes. Damage to an optic nerve or damage to its pathways to the brain results in loss of vision. At a structure in the brain called the optic chiasm, each optic nerve splits, and half of its fibers cross over to the other side. Because of this anatomic arrangement, damage along the optic nerve pathway causes specific patterns of .

Compressive optic nerve lesions at the optic canal by R. UnsoМ€ld Download PDF EPUB FB2

Compressive Optic Nerve Lesions at the Optic Canal: Pathogenesis - Diagnosis - Treatment Softcover reprint of the original 1st ed. Edition by Renate Uns\xf6ld (Author), Wolfgang Seeger (Contributor)Cited by: 7. Compressive Optic Nerve Lesions at the Optic Canal Pathogenesis — Diagnosis — Treatment.

Authors Search within book. Front Matter. Pages I-X. PDF. Introduction. Renate Unsöld, Wolfgang Seeger. CT Findings of Compressive Lesions at the Optic Canal. Unsöld, G. Greeven. Compressive Optic Nerve Lesions at the Optic Canal Pathogenesis – Diagnosis – Treatment. Authors: Unsöld, Renate, Seeger, Wolfgang Free Preview.

Compressive Optic Nerve Lesions at the Optic Canal. by Renate Unsöld,Michael Bach,Wolfgang Seeger,Hans-Rudolf Eggert,Gabriele Greeven,Jack DeGroot. Thanks for Sharing. You submitted the following rating and review. We'll publish them on our site once we've reviewed : Springer Berlin Heidelberg. This work explores the anatomic vulnerability of the optic nerve as it passes from the orbit to the intracranium through a narrow canal surrounded by arteries, bone, and dura.

The text provides individual chapters on anatomy, clinical signs and symptoms, electrophysiologic testing, neuroradiologic findings, and a surgical approach to lesions in Author: Joseph F. Rizzo. Get this from a library.

Compressive Optic Nerve Lesions at the Optic Canal: Pathogenesis - Diagnosis - Treatment. [Renate Unsöld; Wolfgang Seeger] -- This comprehensive monograph opens up sensational new diagnostic and therapeutic perspectives.

The topographic information is presented with excellent anatomic preparations. The wide spectrum of. Book Review; Published: July Compressive optic nerve lesions at the optic canal.

Unsöld, W. Seeger: Pathogenesis-Diagnosis-Treatment. With the collaboration Author: A. Wackenheim. Compressive optic nerve lesions at the optic canal.

Berlin ; New York: Springer-Verlag, © (OCoLC) Online version: Unsöld, R. (Renate), Compressive optic nerve lesions at the optic canal.

Berlin ; New York: Springer-Verlag, © (OCoLC) Document Type: Book: All Authors / Contributors. The optic nerve is particularly vulnerable to injury by a compressive force where it is adjacent to bone or in a small confined space (eg, orbital apex, optic canal).

[ 3 ] The clinical hallmarks of a compressive optic neuropathy include slowly progressive vision loss, reduced visual acuity and/or visual field, dyschromatopsia, a relative. "Compressive lesions within the orbit, the optic canal and, rarely, intracranially, may result in disc swelling (Fig.

Most compressive optic neuropathies, whether they result from orbital or intracranial lesions, are not associated with optic disc swelling.

Dural sheath of the optic nerve. The dural sheath is quite thick and fibrous. It is continuous with the cranial dura mater (Fig. ), and this feature allows us to have a general effect on the dura mater when we manipulate the optic adherence of the optic nerve to the walls of the optic canal, through the intermediary of the meninges, implicates the nerve in the case of skull.

It was surprising that so many patients had arcuate scotomas and other patterns reflecting optic nerve fiber bundle injury since a central scotoma generally is considered to be the most common type of visual field loss associated with compressive injury of the optic nerve, 19 Similar patterns of visual field loss, including steeply sloped.

Summary: We describe six cases of cannalicular optic nerve meningioma in which the diagnosis was missed for more than 1 year after the onset of symptoms. Clinical features led to a misdiagnosis of optic neuritis in all cases. Although atypical clinical progression led to further imaging studies, they did not provide the diagnosis because of inappropriate imaging protocols.

In this chapter, we discuss the main use of OCT in compressive optic neuropathies including primary optic nerve tumors, extrinsic optic nerve compression by tumors or other orbital lesions and the.

Lee "Compressive Optic Nerve Lesions at the Optic Canal Pathogenesis – Diagnosis – Treatment" por Renate Unsöld disponible en Rakuten : Springer Berlin Heidelberg.

Kong DS, Shin HJ, Kim HY, et al. Endoscopic optic canal decompression for compressive optic neuropathy. J Clin Neurosci.

;18(11) Berhouma M, Jacquesson T, Abouaf L, et al. Endoscopic endonasal optic nerve and orbital apex decompression for nontraumatic optic neuropathy: Surgical nuances and review of the literature. Compressive processes of the optic nerve may occur in the intraorbital region, intracanalicular region, optic chiasm, or optic tracts.

Those lesions compressing the orbital optic nerve include. The optic nerve, also known as cranial nerve II, or simply as CN II, is a paired cranial nerve that transmits visual information from the retina to the humans, the optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells; it extends from the optic disc to the optic chiasma and continues as the optic.

Optic (II) nerve. Anatomy. The optic nerve fibres are the axons of the retinal ganglion cells. At the optic chiasm, only the fibres derived from the nasal parts of the retina decussate, join with the non-decussating fibres and pass backwards in their respective optic tracts to.

Intracranial optic nerve • Lengthmm • Dmmm Extends post & medially ascending at an angle of 45º to join the chiasma Blood supply- pial vessels arising from ICA branches from ant cerebral and anterior communicating artery 19 Optic nerve head 4 layers of Optic Nerve Head: • Surface nerve fiber layer.

Causes Ischemic optic neuropathy. In ischemic optic neuropathies, there is insufficient blood flow (ischemia) to the optic nerve. The anterior optic nerve is supplied by the short posterior ciliary artery and choroidal circulation, while the retrobulbar optic nerve is supplied intraorbitally by a pial plexus, which arises from the ophthalmic artery, internal carotid artery, anterior cerebral.

Brain. Mar;98(1) Compressive lesions of the optic nerves and chiasm. Pattern of recovery of vision following surgical treatment. BOOK REVIEWS BOOK REVIEWS Book reviewed in this article: Ophthalmology Today: LN Ferraz De Olivieira (ed) Compressive Optic Nerve Lesions at the Optic Canal: R Unsold, W Seeger Eye, Brain, and Vision: DH Hubel Ocular Circulation & Neovascularisation, Documenta Ophthalmologica Proceedings Series Edited by D Ben Ezra, SJ Ryan, BM Glaser, RP Murphy.

kayan, c. earl; compressive lesions of the optic nerves and chiasm: pattern of recovery of vision following surgical treatment, brain, vol issue 1.

Radiographic features considered characteristic of optic nerve sheath meningioma, 22 such as the “tram track sign” or central optic nerve lucency seen on contrast-enhanced computed tomography (CT), have also been found in metastases to the optic nerve.

23, 24 Although typically more specific and sensitive than CT, MR imaging can still be. To find correlations between diameters of the optic nerve sheath (ONSD), the eyeball, and the optic canal that might be important for intracranial pressure monitoring.

In a prospective cohort study, the CT data of consecutive adults (18+) with healthy eyes and optic nerves and absence of neurological diseases were collected and analyzed. The optic pathway includes the retina, optic nerve, optic chiasm, optic radiations, and occipital cortex (see figure Higher visual pathways).

Damage along the optic pathway causes a variety of visual field defects. The type of field defect can help localize the lesion (see table Types of Field Defects). OPTIC NERVE + OPTIC NERVE LESIONS Robert William B.

King, MD 82 ANATOMY Begins: Optic disc (Anatomically) Ganglion cells of retina (physiologically). ANATOMY First part of ON Approx. M ganglion cells. Axons travers the sclera. through lamina cribrosa ( channels) 1mm Sheathed with dura and.

myelin coating once posterior. 2 Optic Nerve 11 • Positioning of the optic chiasm: The prefi xed chiasm(9%) lies over the tuberculum sellae, 80% over the sella turcica (L., “Turkish saddle”); the postfi xed chiasm (11%) lie s over the dorsum sellae.

• The optic chiasm (Fig. ) is loc ated below the suprachi- asmatic recess of the third ventricle, lamina terminalis. Retrobulbar optic neuropathy (RBON) is a characterized by normal optic disc appearance and specific visual symptoms.

As the injury site of the pathologic process in this optic neuropathy (ON) is behind the optic nerve head, in the other words, behind the lamina cribrosa, or in the intra-orbital or intra-canalicular or intracranial parts of the optic nerve, the optic disc seems normally.

Compared to the optic nerve, the ophthalmic artery is located inferolaterally within the canal. The left and right optic canals are 25mm apart posteriorly and 30mm apart anteriorly.

The canals themselves are funnel-shaped (narrowest anteriorly).Abnormal enhancement of the optic nerve sheath On the left a table with the differential diagnosis of abnormal enhancement of the optic nerve sheath, also called optic nerve tram track sign. Meningioma of nerve sheath is a result of subdural growth leading to progressive visual loss, papilledema, optic atrophy.

There is a strong association.Optic Nerves and Optic Chiasm • Optic nerve (Figs.) contains 1 million fibers (comparison: cochlear ne fibers).

Macular fibers are on the temporal side of the optic disc and the adjacent optic nerve and move to the central part of the nerve as the papillomacular bundle for .