Results 21 to 30 of about 2,749,079 (229)

Study of visual evoked potentials in clinical practice in the patients with primary open-angle glaucoma

Journal of Ophthalmology, 2016
Introduction. It is known that in clinical practice there are no specific neurophysiological tests for diagnosis of glaucoma; however, quite often neurophysiological examination reveals changes which are asymptomatic for a long time before the clinical ...
L.M. Stotska, I.B. Chokova, K.S. Romodanova, V.B. Reshetniak   +3 more
doaj   +1 more source

Steady-state visual evoked potentials can be explained by temporal superposition of transient event-related responses [PDF]

, 2011
<p><b>Background:</b> One common criterion for classifying electrophysiological brain responses is based on the distinction between transient (i.e. event-related potentials, ERPs) and steady-state responses (SSRs).
Paula Pazo-Alvarez, Gross, J., Pazo-Alvarez Paula, Darriba, Álvaro, Darriba Alvaro, Darriba, A., Pablo Campo, Gross, Joachim, Pazo-Álvarez, Paula, Capilla, Almudena, Gross Joachim, Campo, P., Campo, Pablo, Capilla, A., Campo Pablo, Valdes-Sosa, P.A., Almudena Capilla, Darriba Domínguez, Álvaro, Capilla González, Almudena, Alvaro Darriba, Capilla Almudena, Joachim Gross, Pazo-Alvarez, P., Campo Martínez-Lage, Pablo, Pazo Álvarez, Paula   +24 more
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Low-Frequency Local Field Potentials and Spikes in Primary Visual Cortex Convey Independent Visual Information [PDF]

, 2008
Local field potentials (LFPs) reflect subthreshold integrative processes that complement spike train measures. However, little is yet known about the differences between how LFPs and spikes encode rich naturalistic sensory stimuli.
Belitski, A., Logothetis, Nikos K., Magri, C., C. Magri, Montemurro, M.A., Logothetis, N, Panzeri, S, Logothetis, N.K., A. Belitski, Panzeri, Stefano, Murayama, Y., Gretton, A., Y. Murayama, Magri, C, Gretton, A, Murayama, Y, Montemurro, M, Murayama, Yusuke, M. A. Montemurro, N. K. Logothetis, Belitski, Andrei, Panzeri, S., Logothetis, N., Magri, Cesare, Montemurro, Marcelo A., A. Gretton, S. Panzeri, Gretton, Arthur, Belitski, A, Montemurro, M., Montemurro M. A., Murayama Y., Belitski A., Logothetis N. K., Magri C., Gretton A., Panzeri S.   +36 more
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Low luminance/eyes closed and monochromatic stimulations reduce variability of flash visual evoked potential latency

Annals of Indian Academy of Neurology, 2013
Context: Visual evoked potentials are useful in investigating the physiology and pathophysiology of the human visual system. Flash visual evoked potential (FVEP), though technically easier, has less clinical utility because it shows great variations in ...
Senthil Kumar Subramanian, Giriwar Singh Gaur, Sunil K Narayan   +2 more
doaj   +1 more source

Visual evoked potentials in patients after methanol poisoning [PDF]

, 2015
Objectives: We report the results of the visual evoked potentials (VEP) examination in patients after severe poisoning by methanol. Material and Methods: The group of 47 patients (38 males and 9 females) was assembled out of persons who survived an ...
Ridzoň, Petr, Pavel Urban, Urban, Pavel, Pelclová, Daniela, Petr Ridzoň, Diblík, Pavel, Sergey Zakharov, Pavel Diblík, Daniela Pelclová, Zakharov, Sergey   +9 more
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On the stimulus duty cycle in steady state visual evoked potential [PDF]

, 2014
Brain-computer interfaces (BCI) are useful devices that allow direct control of external devices using thoughts, i.e. brain's electrical activity. There are several BCI paradigms, of which steady state visual evoked potential (SSVEP) is the most commonly
Wilson, John J., Palaniappan, Ramaswamy
core   +1 more source

An unusual cause of optic neuritis: rickettsiosis disease

Asian Pacific Journal of Tropical Biomedicine, 2014
Optic neuritis (ON) may be associated to a range of autoimmune or infectious diseases. We report herein a case of ON induced by Rickettsia conorii. A 53-year-old woman presented with a recent decrease in visual acuity and headache.
Loukil Hanen, Snoussi Mouna, Frikha Faten, Ben Salah Raida, Jallouli Moez, Chérif Yosra, El Aoud Sahar, Marzouk Sameh, Bahloul Zouhir   +8 more
doaj   +1 more source

Rapid enhancement of touch from non-informative vision of the hand [PDF]

, 2012
Processing in one sensory modality may modulate processing in another. Here we investigate how simply viewing the hand can influence the sense of touch. Previous studies showed that non-informative vision of the hand enhances tactile acuity, relative to ...
Longo, Matthew R., Cardini, Flavia, Driver, Jon, Driver, J., Haggard, Patrick, Cardini, F., Haggard, P.   +6 more
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Evaluation of Visual Evoked Potentials in Patient with Angelmans Syndrome - Case Report

Balkan Medical Journal, 2013
Background: Angelman syndrome (AS) is a genetic disorder with varying degrees of neurological impairment. It is often associated with ocular involvement.
Tatjana Knezevic, Dejan Nikolic, Ivana Petronic, Dragana Cirovic, Vera Krstic, Sinisa Ducic, Ljubica Konstantinovic, Calogero Foti   +7 more
doaj   +1 more source

Towards improved visual stimulus discrimination in an SSVEP BCI [PDF]

, 2010
The dissertation investigated the influence of stimulus characteristics, electroencephalographic (EEG) electrode location and three signal processing methods on the spectral signal to noise ratio (SNR) of Steady State Visual Evoked Potentials (SSVEPs ...
Hodgskiss, Dean Leslie
core   +1 more source