Linking perception to neural activity as measured by visual evoked potentials

2013 ◽  
Vol 30 (5-6) ◽  
pp. 223-227 ◽  
Author(s):  
ANTHONY M. NORCIA
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Neural Activity ◽  
Cortical Area ◽  
Related Concept ◽  
The Relationship ◽  
Over Time ◽  
Visual Evoked

AbstractLinking propositions have played an important role in refining our understanding of the relationship between neural activity and perception. Over the last 40 years, visual evoked potentials (VEPs) have been used in many different ways to address questions of the relationship between neural activity and perception. This review organizes and discusses this research within the linking proposition framework developed by Davida Teller, and her colleagues. A series of examples from the VEP literature illustrates each of the five classes of linking propositions originally proposed by Davida Teller. The related concept of the bridge locus—the site at which neural activity can be said to first be proscriptive of perception—is discussed and a suggestion is made that the concept be expanded to include an evolution over time and cortical area.

Nonlinear Analysis of Visual Evoked Potentials Elicited by Color Stimulation

1997 ◽  
Vol 36 (04/05) ◽  
pp. 315-318 ◽  
Author(s):  
K. Momose ◽  
K. Komiya ◽  
A. Uchiyama
Keyword(s):  
Visual System ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Normal Subjects ◽  
Second Order ◽  
First Order ◽  
The Relationship ◽  
Perceived Color ◽  
Second Order Nonlinearity ◽  
Visual Evoked

Abstract:The relationship between chromatically modulated stimuli and visual evoked potentials (VEPs) was considered. VEPs of normal subjects elicited by chromatically modulated stimuli were measured under several color adaptations, and their binary kernels were estimated. Up to the second-order, binary kernels obtained from VEPs were so characteristic that the VEP-chromatic modulation system showed second-order nonlinearity. First-order binary kernels depended on the color of the stimulus and adaptation, whereas second-order kernels showed almost no difference. This result indicates that the waveforms of first-order binary kernels reflect perceived color (hue). This supports the suggestion that kernels of VEPs include color responses, and could be used as a probe with which to examine the color visual system.

Temporal Modulation of Steady-State Visual Evoked Potentials

2019 ◽  
Vol 29 (03) ◽  
pp. 1850050 ◽  
Author(s):  
Maciej Labecki ◽  
Maria Malgorzata Nowicka ◽  
Piotr Suffczynski
Keyword(s):  
Steady State ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Second Harmonic ◽  
Temporal Changes ◽  
Harmonic Frequency ◽  
Physiological Basis ◽  
Frequency Components ◽  
Over Time ◽  
Visual Evoked

Electroencephalographic responses to periodic stimulation are termed steady-state visual evoked potentials (SSVEP). Their characteristics in terms of amplitude, frequency and phase are commonly assumed to be stationary. In this work, we tested this assumption in 30 healthy participants submitted to 50 trials of 60[Formula: see text]s flicker stimulation at 15[Formula: see text]Hz frequency. We showed that the amplitude of the first and second harmonic frequency components of SSVEP signals were in general not stable over time. The power (squared amplitude) of the fundamental component was stationary only in 30% the subjects, while the power at the second harmonic frequency was stationary in 66.7% of the group. The phases of both SSVEP frequency components were more stable over time, but could exhibit small drifts. The observed temporal changes were heterogeneous across the subjects, implying that averaging results over participants should be performed carefully. These results may contribute to improved design and analysis of experiments employing prolonged visual stimulation. Our findings offer a novel characterization of the temporal changes of SSVEP that may help to identify their physiological basis.

The relationship between visual seizures and visual evoked potentials

1985 ◽  
Vol 28 (3-4) ◽  
pp. 297-305 ◽  
Author(s):  
John R. Hughes ◽  
James L. Stone ◽  
Boris A. Vern ◽  
Anne C. Weiss ◽  
John J. Fino ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
The Relationship ◽  
Visual Evoked

Relationship between visual evoked potentials and intracranial pressure

1981 ◽  
Vol 55 (6) ◽  
pp. 909-916 ◽  
Author(s):  
Donald H. York ◽  
Morris W. Pulliam ◽  
John G. Rosenfeld ◽  
Clark Watts
Keyword(s):  
Intracranial Pressure ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Severe Head Injury ◽  
Potential Role ◽  
Content Type ◽  
The Relationship ◽  
Normal Latency ◽  
Fine Print ◽  
Visual Evoked

✓ The relationship between intracranial pressure (ICP) and latency of visual evoked potentials (VEP) was investigated in hydrocephalic patients with suspected shunt malfunction and in patients with severe head trauma. A positive correlation of increase in latency of wave N2 (normal latency 71 ± 9.2 msec) of the VEP with elevations in ICP was observed. A potential role for VEP in both the assessment of shunt function and the monitoring of patients with severe head injury is suggested by these findings.

scholarly journals Evaluation of the Relationship Between Preferential Looking Testing and Visual Evoked Potentials as a Biomarker of Cerebral Visual Impairment

2021 ◽  
Vol 15 ◽  
Author(s):  
Sruti Raja ◽  
Batool Sahar Emadi ◽  
Eric D. Gaier ◽  
Ryan A. Gise ◽  
Anne B. Fulton ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Evoked Potentials ◽  
Visual Impairment ◽  
Visual Evoked Potentials ◽  
Visual Development ◽  
Diagnostic Tools ◽  
Preferential Looking ◽  
The Relationship ◽  
Cerebral Visual Impairment ◽  
Visual Evoked

Cerebral visual impairment (CVI) is a leading cause of visual impairment in children in developed countries, but diagnostic tools to detect CVI are limited. We sought to analyze the visual acuity of children with CVI as assessed by visual evoked potentials (VEPs) and preferential looking test (PLT) to determine whether the relationship between the visual outcomes on these two testing methods may serve as a biomarker of CVI. We performed a retrospective chart review of patients with a confirmed diagnosis of CVI and at least one ophthalmological assessment with visual acuity measured by VEP and PLT. Of the 218 patients included in the study, the most common condition associated with CVI was an underlying genetic disorder (36%, 79/218). Treatment for seizures occurred in the majority of the entire cohort of patients (80%, 175/218). Ophthalmic comorbidities included retinal disease in 23 patients, optic nerve disease in 68 patients, nystagmus in 78 patients, and strabismus in 176 patients. When assessed by either VEP or PLT, visual acuity in children with CVI fell below expected norms. At initial and final presentations, VEP acuity exceeded PLT acuity by one or more octaves, and this difference was greater than expected compared with normal visual development. We propose utilizing this quantifiable disparity between VEP and PLT as a biomarker of CVI.

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