Vascularization of the Primary Optic Pathways

François, J.; Neetens, A; Collette, J. M.

doi:10.1136/bjo.42.2.65

Cited by 29 publications

(16 citation statements)

References 2 publications

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“…The inferior bundle initially passes anteriorly to loop into the temporal lobe before passing posteriorly through the parietal lobe. The blood supply to the optic radiations is predominantly from the posterior and middle cerebral arteries [24]. The nerve fibres of the optic radiations terminate in the visual striate cortex (V1) which is located on the medial aspect of the occipital lobe, superior and inferior to the calcarine fissure.…”

Section: Introductionmentioning

confidence: 99%

“…A parieto-occipital branch supplies the superior calcarine lip, a posterior temporal branch supplies its inferior lip, and a calcarine branch supplies the central region posteriorly. The middle cerebral artery may supply the posterior aspect of the calcarine sulcus with an anastomosis between posterior and middle cerebral arteries accounting for sparing of the macula in cases of posterior cerebral artery occlusion [24, 25]. …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Prospective Profile of Visual Field Loss following Stroke: Prevalence, Type, Rehabilitation, and Outcome

Rowe

Wright

Brand

et al. 2013

BioMed Research International

133

119

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Aims. To profile site of stroke/cerebrovascular accident, type and extent of field loss, treatment options, and outcome. Methods. Prospective multicentre cohort trial. Standardised referral and investigation protocol of visual parameters. Results. 915 patients were recruited with a mean age of 69 years (SD 14). 479 patients (52%) had visual field loss. 51 patients (10%) had no visual symptoms. Almost half of symptomatic patients (n = 226) complained only of visual field loss: almost half (n = 226) also had reading difficulty, blurred vision, diplopia, and perceptual difficulties. 31% (n = 151) had visual field loss as their only visual impairment: 69% (n = 328) had low vision, eye movement deficits, or visual perceptual difficulties. Occipital and parietal lobe strokes most commonly caused visual field loss. Treatment options included visual search training, visual awareness, typoscopes, substitutive prisms, low vision aids, refraction, and occlusive patches. At followup 15 patients (7.5%) had full recovery, 78 (39%) had improvement, and 104 (52%) had no recovery. Two patients (1%) had further decline of visual field. Patients with visual field loss had lower quality of life scores than stroke patients without visual impairment. Conclusions. Stroke survivors with visual field loss require assessment to accurately define type and extent of loss, diagnose coexistent visual impairments, and offer targeted treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Prospective Profile of Visual Field Loss following Stroke: Prevalence, Type, Rehabilitation, and Outcome

Rowe

Wright

Brand

et al. 2013

BioMed Research International

133

119

View full text Add to dashboard Cite

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“…The results of the authors who gave detailed descriptions of the existence of the central artery of the optic nerve showed that it proceeded to the retina. Nevertheless, they estimated that it did not participate in vascularization of the optic nerve [6]. The other groups of authors had doubts about the existence of this kind of vascular division.…”

Section: Discussionmentioning

confidence: 98%

“…The earliest descriptions have pointed out that pial arterial plexus vascularize optic nerve over its entire length [6]. This vascular scheme was completed with the indings of other researchers, who described more branches, 1-3, coming from the ophtalmic artery (OA), as it passed through the optic canal [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of perioptic and intraoptic arterial vascularization of extracranial segment of optic nerve

Balaban-Djurević

Hajrović²,

Šolaja³

et al. 2019

Biomedicinska istraž.

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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.

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“…The visual field in this case demonstrates a predominantly scotomatous defect and, in the absence of any marked infero-nasal defect in the peripheral field which would correspond to the supero-lateral position of the tumour, the macular sensitivity is more readily explained on a vascular basis. It has been shown that there is no axial artery in the intracanalicular portion of the optic nerve, but that the blood supply is by a pre-capillary plexus, the distribution of which is irregular (Fran9ois, Neetens, and Collette, 1958). Thus the field changes in this case conform with those described in other cases of optic nerve compression (Traquair, 1946;Hughes, 1958), and there is evidence that the scotoma is extending peripherally, though the breakthrough is not occurring in the peripheral fibres directly related to the site of the tumour.…”

Section: Discussionmentioning

confidence: 99%