background and objective: vep is a powerful method to study visual system via evaluating evoked potentials. technologic and instrumental restrictions may be the reason of having studies on optical modulation and induction such as color, spatial frequency and contrast. developments of computer software and hardware may lead to an increase in the flexibility of pattern designs. material and meth...

In order to clarify the effects of 2,5-hexanedione (2,5-HD) on the central nervous system, the somatosensory evoked potentials (SEP) and the visual evoked potentials (VEP) were experimentally studied. Eight male rats (Jcl-Wistar) were given subcutaneously 300 mg/kg/day of 2,5-HD five days a week for three weeks. Another eight male rats group served as the control. One week after ending the admi...

Although a delayed visual evoked potential is considered to be the hallmark of optic nerve disease, relatively little has been published about VEP delays in macular disease. In this study, 20 patients with either acquired unilateral maculopathy or bilateral maculopathy in which one eye was more affected than the other were evaluated. VEP amplitudes and peak latencies were compared between eyes ...

Citicoline may be used in many neurological disorders. Combined treatment of citicoline with patching in amblyopia has previously been researched. The purpose of this paper is to illustrate the effect of citicoline in non-patching amblyopic patient. A 11-year-old amblyopic boy underwent complete ophthalmological examinations, including VEP with flash and pattern stimulus. Two averages of 100 sw...

A violation of Local Lorentz Invariance (VLI) and hence the special theory of relativity or a violation of equivalence principle (VEP) in the Kaon system can, in principle, induce oscillations between K0 and K̄0. We construct a general formulation in which simultaneous pairwise diagonalization of mass, momemtum, weak or gravitational eigenstates is not assumed. We discuss this problem in a gener...

PURPOSE To investigate whether a rapid and practical determination of the temporal frequency characteristic (TFC) of the visual system can be obtained by using the visually evoked potentials (VEPs) elicited by pseudorandom binary sequence (PRBS) stimulation. METHODS VEPs were recorded from eight volunteers. For the conventional steady state VEPs (S-VEP), the eye was stimulated with five stimu...

Under conditions in which the visual system cannot reconcile dissimilar images from the two eyes, perception typically alternates between the two half-images-a process known as binocular rivalry. We report a real-time, steady-state VEP method that is a sensitive detector of the continuous alternations in perceptual dominance across the eyes. This method works by labelling each half-image with a...

Tourism planning is widely considered to be a highly political process, particularly when tourism is only one of a number of possible land uses and there are numerous stakeholders, with a diversity of interests, all trying to influence the outcome. The winners are typically those holding power, while the losers are often the destination community, who lack sufficient power to influence planning...

everal previous clinical research studies1--6 have found he pattern visual-evoked potential (VEP) to be useful in etecting a wide range of visual-field defects objectively. n a previous study completed in our laboratory,6 circuar, annular, hemi-field, and quadrant absolute visual-field efects were simulated and assessed objectively for detecion and discrimination using the pattern VEP method. h...

The violation of the equivalence principle (VEP) causing neutrino oscillations is of current interest. We study here the possibility of not only flavor oscillation but spin flavor oscillation of ultra high energy (∼ 1 PeV) neutrinos emanating from AGN due to VEP and due to the presence of a large magnetic field (∼ 1 Tesla) in AGN. In particular we look at the resonance spin flavor conversion dr...