Asymmetry and ventral course of the human geniculostriate pathway as determined by hippocampal visual evoked potentials and subsequent visual field defects after temporal lobectomy

1982 ◽  
Vol 47 (3) ◽  
Author(s):  
T.L. Babb ◽  
C.L. Wilson ◽  
P.H. Crandall
Keyword(s):  
Visual Field ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Temporal Lobectomy ◽  
Visual Field Defects ◽  
Field Defects ◽  
Visual Evoked

Innovative evaluation of visual field defects in epileptic patients after standard anterior temporal lobectomy, using partial field visual evoked potentials

2010 ◽  
Vol 90 (1-2) ◽  
pp. 68-74 ◽  
Author(s):  
Margarita Minou Báez Martín ◽  
Yamila del Carmen Pérez Téllez ◽  
Lilia María Morales Chacón ◽  
Bárbara Estupiñán Díaz ◽  
Otto Trápaga-Quincoses ◽  
...  
Keyword(s):  
Visual Field ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Temporal Lobectomy ◽  
Visual Field Defects ◽  
Anterior Temporal Lobectomy ◽  
Epileptic Patients ◽  
Field Defects ◽  
Visual Evoked

201. Visual evoked potentials: An objective evaluation of the visual field defects consecutive to temporal lobotomy in epileptic patients

2008 ◽  
Vol 119 (9) ◽  
pp. e148
Author(s):  
M.M. Báez Martín ◽  
Y. Pérez Téllez ◽  
L. Morales Chacón ◽  
I. Cabrera Abreu ◽  
B.O. Estupiñán Díaz ◽  
...  
Keyword(s):  
Visual Field ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Objective Evaluation ◽  
Visual Field Defects ◽  
Epileptic Patients ◽  
Field Defects ◽  
Visual Evoked

scholarly journals Significance of Visual Evoked Potentials in the Assessment of Visual Field Defects in Primary Open-Angle Glaucoma: A Review

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ruchi Kothari ◽  
Pradeep Bokariya ◽  
Smita Singh ◽  
Ramji Singh
Keyword(s):  
Visual Field ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Objective Measure ◽  
Visual Field Defects ◽  
Open Angle ◽  
Field Defects ◽  
Visual Evoked

Visual evoked potentials is an important visual electrophysiological tool which has been used for the evaluation of visual field defects in primary open-angle glaucoma and is an appropriate objective measure of optic nerve function. Significant correlations between the magnitude of the VEP parameters and MD of Humphrey static perimetry suggest that the impaired visual cortical responses observed in glaucoma patients can be revealed by both electrophysiological and psychophysical methods. In addition, the severity of global glaucomatous damage evidenced by reduction in MD could depend on the delay in neural conduction from retina to the visual cortex as revealed by the significant correlation between VEP latencies and MD which also supports the validity of the VEP testing in progression of glaucoma.

scholarly journals Integrated electrophysiological evaluation in early normal-tension glaucoma

2016 ◽  
Vol 1 (2) ◽  
pp. 79-88
Author(s):  
Dario Messenio ◽  
Giuseppe Marano ◽  
Elia Biganzoli
Keyword(s):  
Optic Nerve ◽  
Visual Field ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Optic Nerve Head ◽  
Pattern Electroretinogram ◽  
Normal Subjects ◽  
Visual Field Defects ◽  
Control Group ◽  
Visual Evoked

Purpose: To evaluate the variations of intraocular pressure (IOP), morphometric optic nerve head characteristic, perimetric indices and electrophysiological parameters (pattern electroretinogram and visual evoked potentials) before and after topical IOP lowering in patients with early normal-tension glaucoma.Methods: we evaluated 38 eyes of 20 patients with IOP < 21 mmHg, initial glaucomatous optic neuropathy (valued with HRT: retinal nerve fiber layer thickness (RNFL) and linear cup/disk ratio (linear C/D ratio)), minimal visual field defects (Octopus 101: G2 program), best correct visual acuity more than 15/20 and pathological electrophysiological parameters (valued with pattern electroretinogram (PERG) and visual evoked potentials (VEPs)), free of systemic or other ocular diseases. All parameters were evaluated at the beginning of the study (T0) and after 12 months of therapy (T12). A randomized normal control group (27 eyes of 14 subjects) with apparent larger disc cupping underwent all exams at initial of study (T0) and after 12 months (T12).Results: Among electrophysiological parameters, at the beginning of the study NTG P100 VEPs latency is slightly increased and P100 amplitude is reduced compared to normal subjects. There are not significant variations after 12 months. P50 PERG latency in NTG is quite similar respect normal and do not modify after therapy. P50N95 complex PERG amplitude in NTG is reduced compared to normal subjects and slightly increases after 12 months (1.8 vs 1.5 ; 2.4 vs 1.9 micronvolts, with different checkboard spatial frequency). Cortical retinal time (CRT) is slightly delayed in NTG and does not modify. Among visual field indices, MD and CLV is slightly higher in NTG and do not significantly modify after therapy. Among morphometric optic nerve head characteristics, linear C/D and RNFL thickness are quite similar in NTG and do not modify. IOP is quite similar between NTG and control group and modifies in NTG after therapy.Conclusion: In a viewpoint of an integrated diagnostic, electrophysiological tests (VEPs and PERG) could provide a more sensitive measure of retinal ganglion cell integrity and help to distinguish between early normal-pressure glaucoma patients with no or minimal visual field alterations and normal subjects with apparent larger disc cupping.

VISUAL FIELD DEFECTS AFTER TEMPORAL LOBECTOMY

2009 ◽  
Vol 35 (3) ◽  
pp. 210-216 ◽  
Author(s):  
Ǎke Björk ◽  
Eric Kugelberg
Keyword(s):  
Visual Field ◽  
Temporal Lobectomy ◽  
Visual Field Defects ◽  
Field Defects

scholarly journals Inflammatory optic neuropathy in Behçet’s disease

Reumatismo ◽  
2016 ◽  
Vol 67 (4) ◽  
pp. 156 ◽  
Author(s):  
M. S. Khanfir ◽  
N. Belfeki ◽  
F. Said ◽  
T. Ben Salem ◽  
I. Ben Ghorbel ◽  
...  
Keyword(s):  
Visual Field ◽  
Evoked Potentials ◽  
Behçet’S Disease ◽  
Visual Evoked Potentials ◽  
Optic Neuropathy ◽  
Behcet’S Disease ◽  
Behçet's Disease ◽  
Clinical Manifestations ◽  
Behcet's Disease ◽  
Visual Evoked

Inflammatory optic neuropathy (ON) is a rare event in Behçet’s disease (BD). We report herein a series of ten BD Tunisian patients with ON and describe its clinical features among them. A retrospective review of BD patients (International Study Group for BD criteria) was performed. The patients were divided into two groups: those presenting an inflammatory ON, and those none. The diagnosis of inflammatory ON was based on the clinical examination, visual field and visual evoked potentials. We analyzed the characteristics of the two groups. Ten patients (2.3%) presented an inflammatory ON among our 440 patients. Inflammatory ON was inaugural in 8 cases. Clinical manifestations were as follows: blurred vision (7 cases) and periorbital pain (3 cases). In two cases, the patients did not complain from ophthalmological symptoms. The fundus revealed a papilledema (2 cases), papillary pallor (4 cases), and was normal in 5 cases. Visual field realized in only three patients showed a scotoma in all cases. Visual evoked potentials revealed increased latency in all cases. All patients received corticosteroids associated to an immunosuppressive agent. The comparative study between the two groups revealed that inflammatory ON was significantly more associated to neurological involvement (p&lt;0.0001) and that the disease was more severe in the ON group (p&lt;0.0001). Inflammatory ON in BD is rare and may occur at an early stage of the clinical course of the disease. Its prevalence is certainly underestimated. A systematic visual evoked potential may be interesting as a screening tool.

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