Results: 19

Seventy years since the invention of the averaging technique in Neurophysiology: Tribute to George Duncan Dawson

Arq. neuropsiquiatr; 80 (2), 2022
ABSTRACT In 1951, the physiologist George Duncan Dawson presented his work with the averaging of the signal in the evoked potentials (EPs), opening a new stage in the development of clinical neurophysiology. The authors present aspects of Professor Dawson's biography and a review of his work on the EPs a...

Noninvasive intracranial pressure monitoring methods: a critical review

Arq. neuropsiquiatr; 79 (5), 2021
ABSTRACT Background: Intracranial pressure (ICP) monitoring has been used for decades in management of various neurological conditions. The gold standard for measuring ICP is a ventricular catheter connected to an external strain gauge, which is an invasive system associated with a number of complicatio...

Grating visual acuity impairment assessed by sweep visually evoked potentials in children with optic pathway tumors unable to perform optotype acuity tests

Arq. bras. oftalmol; 84 (2), 2021
ABSTRACT Purpose: To determine visual impairment due to optic pathway tumors in children unable to perform recognition acuity tests. Methods: Grating visual acuity scores, in logMAR, were obtained by sweep visually evoked potentials (SVEP) in children with optic pathway tumors. The binocular grating vi...

Respuestas evocadas visuales mediante estimulación con diodos emisores de luz montados en gafas
Visual evoked responses to light-emitting diodes in goggles

Rev. cuba. pediatr; 91 (4), 2019
Introducción: El potencial evocado visual es una técnica que permite la evaluación de la integridad funcional de la vía visual; su aplicación en niños pequeños resulta de gran dificultad. Objetivo: Caracterizar desde el punto de vista fisiológico el potencial evocado visual en niños menores de ...

Diferencias en procesamiento cerebral visual temprano en niños con trastorno del déficit de atención
Differences in early visual cerebral processing in children with attention deficit / hyperactivity disorders with predominance of no attention

Medicina (B.Aires); 79 (1,supl.1), 2019
Para evaluar los procesos atencionales a estímulos visuales que no requieren repuesta motora, se llevó a cabo un estudio con potenciales evocados a 17 niños con trastornos del déficit de atención/ hiperactividad (TDAH-I) con predominio inatento y a 15 controles de edades entre 7 y 11 años. Se anali...

Clinical and electrophysiological correlation in patient with optic neuritis

A descriptive and traverse study was performed in patients with diagnosis of optic neuritis, that attended to the neuro ophthalmology service of the ophthalmological center, at the Santiago General Hospital Dr. Juan Bruno Zayas Alfonso , from the province of Santiago de Cuba, with less than a week of evo...

Potencial evocado visual em cães e ovinos

Pesqui. vet. bras; 37 (4), 2017
O potencial evocado visual (PEV) é técnica eletrodiagnóstica que permite avaliação das vias visuais. O PEV de 20 cães e 20 ovinos adultos, de ambos os sexos, foram obtidos para estudo normativo. Foram utilizados eletrodos de agulha monopolar posicionados em O1 e O2 (ativos), em Fpz (referência com...

Pattern-reversal visual evoked potentials as a diagnostic tool for ocular malingering

Arq. bras. oftalmol; 79 (5), 2016
ABSTRACT Purpose: To investigate the contributions of transient pattern-reversal visual evoked potentials in the diagnosis of ocular malingering at a Brazilian university hospital. Methods: Adult patients with suspected malingering in one or both eyes were referred for visual evoked potential testing. ...

Dysfunction in the fellow eyes of strabismic and anisometropic amblyopic children assessed by visually evoked potentials

Arq. bras. oftalmol; 79 (5), 2016
ABSTRACT Purpose: To evaluate visual acuity and transient pattern reversal (PR) visual evoked potentials (VEPs) in the fellow eyes of children with strabismic and/or anisometropic amblyopia. Methods: Children diagnosed with strabismic and/or anisometropic amblyopia were recruited for electrophysiologic...

Normatização do eletrorretinograma por reversão alternada de padrões em voluntários normais
Standardization of pattern electroretinograms by alternate reversion in normal volunteers

Arq. bras. oftalmol; 66 (4), 2003
OBJETIVO: Realizar a normatizaçäo do eletrorretinograma por reversäo alternada em indivíduos oftalmologicamente normais e sem doenças neurológicas associadas, determinando a faixa de normalidade estratificada por sexo, faixa etária e estímulo utilizado. MÉTODOS: A padronizaçäo seguiu o modelo ...