Results 251 to 260 of about 73,840 (305)

Visual Evoked Potentials

American Journal of Electroneurodiagnostic Technology, 2008
Pattern reversal evoked potentials (PVEPs) are a noninvasive procedure that are useful for detecting lesions of the visual pathways. This article reviews anatomy of the visual pathway and the testing protocols for fullfield and hemifield PVEP and flash (goggle) visual evoked potentials (FVEP).
Sheryl, Nehamkin, Michael, Windom, Tanvir U, Syed   +2 more
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Visually evoked potentials

2019
The term visually evoked potential (VEP) refers to electrical potentials recorded from scalp overlying visual cortex that have been extracted from the electroencephalogram by signal averaging. Usually the recording electrode is placed on the midline of the occipital scalp at the back of the head.
Donnell Creel, Minzhong Yu
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Visual evoked potentials in sarcoidosis

Neurology, 1981
The visual evoked potential to pattern reversal was recorded in 50 patients with sarcoidosis. Abnormalities of latency and amplitude were found in 15 patients (30%), including all 4 patients with clinically evident brain disease and 4 of 17 patients with overt ocular disease. Twenty-nine patients had no clinical evidence of ocular or neurologic disease,
L J, Streletz, R A, Chambers, S H, Bae, H L, Israel   +3 more
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The Multifocal Visual Evoked Potential

Journal of Neuro-Ophthalmology, 2003
With the multifocal technique, visual evoked potentials (VEPs) can be recorded simultaneously from many regions of the visual field. For the multifocal VEP (mfVEP), the patient views a display that typically contains 60 sectors, each with a checkerboard pattern.
Donald C, Hood, Jeffrey G, Odel, Bryan J, Winn   +2 more
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Visual evoked potentials of infants

Revue d&'apos;Electroencéphalographie et de Neurophysiologie Clinique, 1972
Resume Les auteurs ont montre dans un travail anterieur que la configuration du P.E.V. chez le nouveaune et chez l'enfant de 3 mois montre une grande var iabilite diurne ; par ailleurs et contrairement au P.E.V. de l'adulte la configuration de ce P.E.V. n'est pas liee au cycle de veille-sommeil.
R J, Ellingson, G H, Lathrop, B, Nelson, T, Danahy   +3 more
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Visual evoked potentials in monkeys

Electroencephalography and Clinical Neurophysiology, 1979
Visual evoked potentials (VEPs) were recorded from 2 cortical sites in stump-tailed macaques. VEPs recorded from striate cortex were basically consistent between animals (especially at low light intensity), remained remarkably stable over time, and compared favorably to VEPs reported by other investigators.
E W, Snyder, E C, Beck, R E, Dustman
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The visually evoked potential in twins

Electroencephalography and Clinical Neurophysiology, 1965
Abstract Visually evoked responses were studied in monozygotic and dizygotic twins, triplets and unrelated children age-matched with the monozygotic twins. Scalp leads from occipital and central areas carried EEG activity to an electronic computer (CAT) which was set to sum evoked responses, following 100 flashes of light.
R E, Dustman, E C, Beck
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Biofeedback of Visual Evoked Potentials

International Journal of Neuroscience, 1986
The present study investigated the operant conditioning of visual evoked potentials within a latency range between 200 and 600 ms using a visual discrimination task, and scrutinized whether biofeedback-induced potential shifts covaried with behavioral responses (reaction time, RT).
W, Miltner, W, Larbig, C, Braun
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Visual Evoked Potentials in Alcoholics

Clinical Electroencephalography, 1983
Visual evoked potentials were obtained in nineteen patients during the early phase of alcohol intoxication. Out of the thirty-eight responses recorded in the nineteen patients, 13% were found to be abnormal (5 responses). Repeated testing was done in all patients with abnormal responses at three to four week intervals following treatment with vitamins ...
I, Ahmed, K S, Hines
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Visual evoked potentials in migraine

Neurological Sciences, 2004
Migraine is a chronic disorder. Visual symptoms and hypersensitivity to light stimuli are common. The aim of this study is the analysis of visual system in migraineurs by visual evoked potentials (VEP). We studied 53 migraineurs (21 with prophylactic migraine treatment and 32 without preventive therapy) and 20 healthy control subjects.
Spreafico, C, Frigerio, R, Santoro, P, FERRARESE, CARLO, Agostoni, E.   +4 more
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