Rapid visual stimulation increases extrasynaptic glutamate receptor expression but not visual-evoked potentials in the adult rat primary visual cortex

2013 ◽  
Vol 37 (3) ◽  
pp. 400-406 ◽  
Author(s):  
M. J. Eckert ◽  
D. Guévremont ◽  
J. M. Williams ◽  
W. C. Abraham
Keyword(s):  
Visual Cortex ◽  
Evoked Potentials ◽  
Glutamate Receptor ◽  
Primary Visual Cortex ◽  
Visual Evoked Potentials ◽  
Visual Stimulation ◽  
Receptor Expression ◽  
Adult Rat ◽  
Visual Evoked

Analysis of Visual-Evoked Potentials of Primary Visual Cortex under Flash Stimulations

2013 ◽  
Vol 749 ◽  
pp. 328-332
Author(s):  
Shu Li Chen ◽  
Zhi Zhong Wang ◽  
Li Shi ◽  
Xiao Ke Niu
Keyword(s):  
Visual Cortex ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Sensory Processing ◽  
Evoked Potential ◽  
Visual Stimulation ◽  
Neurological Diseases ◽  
Occipital Cortex ◽  
Pattern Evoked Potentials ◽  
Visual Evoked

Visual-evoked potentials (VEPs) which is made up of electrical signals generated by the nervous system in response to a stimulus can be easily recorded from the visual cortex of the experiment animal. There are several types of VEPs, for example, flash evoked potential (FEP), pattern evoked potential [1-3]. The FEP is produced by a visual stimulation with a brief and diffuse flash light. It is frequently used to evaluate the neural activity and sensory processing in the visual system [ and to identify and characterize the changes occurring in the retina and the occipital cortex [4, 5]. VEPs can also provide a further therapeutic approach through the stimulate of monitoring neurophysiologic changes related to diseases [6, 7]. The pattern evoked potentials have been used to assess parametric characteristics of visual perception, detect neuronal irritability and diagnose neurological diseases [8-1.

scholarly journals Steady-State Visual Evoked Potentials Elicited from Early Visual Cortex Reflect Both Perceptual Color Space and Cone-Opponent Mechanisms

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Sae Kaneko ◽  
Ichiro Kuriki ◽  
Søren K Andersen
Keyword(s):  
Visual Cortex ◽  
Steady State ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Color Space ◽  
Color Contrast ◽  
Response Latencies ◽  
Opponent Color ◽  
Early Visual Cortex ◽  
Visual Evoked

Abstract Colors are represented in the cone-opponent signals, L-M versus S cones, at least up to the level of inputs to the primary visual cortex. We explored the hue selective responses in early cortical visual areas through recordings of steady-state visual evoked potentials (SSVEPs), elicited by a flickering checkerboard whose color smoothly swept around the hue circle defined in a cone-opponent color space. If cone opponency dominates hue representation in the source of SSVEP signals, SSVEP amplitudes as a function of hue should form a profile that is line-symmetric along the cardinal axes of the cone-opponent color space. Observed SSVEP responses were clearly chromatic ones with increased SSVEP amplitudes and reduced response latencies for higher contrast conditions. The overall elliptic amplitude profile was significantly tilted away from the cardinal axes to have the highest amplitudes in the “lime-magenta” direction, indicating that the hue representation in question is not dominated by cone-opponency. The observed SSVEP amplitude hue profile was better described as a summation of a perceptual response and cone-opponent responses with a larger weight to the former. These results indicate that hue representations in the early visual cortex, measured by the SSVEP technique, are possibly related to perceptual color contrast.

Correspondence of Visual Evoked Potentials with FMRI Signals in Human Visual Cortex

2008 ◽  
Vol 21 (2) ◽  
pp. 86-92 ◽  
Author(s):  
Whittingstall Kevin ◽  
Wilson Doug ◽  
Schmidt Matthias ◽  
Stroink Gerhard
Keyword(s):  
Visual Cortex ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Human Visual Cortex ◽  
Visual Evoked

Steady-State Visual-Evoked Potentials in Headache: Diagnostic Value in Migraine and Tension-Type Headache Patients

Cephalalgia ◽  
1999 ◽  
Vol 19 (1) ◽  
pp. 23-26 ◽  
Author(s):  
M de Tommaso ◽  
V Sciruicchio ◽  
M Guido ◽  
G Sasanelli ◽  
F Puca
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Visual Stimulation ◽  
Normal Subjects ◽  
Tension Type Headache ◽  
Brain Response ◽  
Mean Values ◽  
Type Headache ◽  
Headache Patients ◽  
Visual Evoked

We tested the hypothesis that migraine and tension-type headache are separate disorders based on visual evoked potentials. We recruited 120 migraine without aura patients (MwoA), 64 tension-type headache patients (TTH), and 51 healthy controls. We performed discriminant analysis combined with a stepwise selection of predictors. Mean values of the F1 component were significantly increased over Fp1, C3, P4, O2 and O1 electrodes in MwoA and TTH patients compared with normal subjects. Only the control subjects were correctly distinguished. The increased brain response to visual stimulation detected in both MwoA and TTH may suggest a common neuronal dysfunction in the two headache subtypes.

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