Twenty seven patients with migraine without aura were investigated. The age was between 12 and 54 years; 5 were men and 22 women. The diagnosis of migraine was made according to the classification proposed by the International Headache Society. The method of visual evoked potential was performed with pattern reversal (VEP-PR), with monocular stimulation. The stimulation was performed with patte...

Glavobolja je jedan od najčešćih simptoma u neurologiji i vrlo čest uzrok recidivirajućih bolova djece. Glava, lice meki oglavak bogato su opskrbljeni receptorima za bol odnosu na ostale dijelove tijela, što može objasniti zašto bolovi tako često lokalizirani glavi. Glavobolje česte djece adolescenata. One imaju negativan utjecaj učenje djeteta, pamćenje, osobnost, međuljudske odnose ili s vršn...

The natural visual acuities of 15 adult persons were predicted on the basis of changes in visual evoked potentials (VEP's) to flashed patterns of various sized dots. An objective method was used to quantify the VEP's, based on the minimum-sized stimulus that would elicit a pattern VEP- the VEP pattern threshold. This measure was highly correlated with recognition and resolution measures of perc...

This paper presents an online energy management system based on a virtual energy provisioning (VEP) concept. VEP is a novel demand side management inspired by the lean supply chain technology. It aims to control the process of energy generation, delivery, and consumption under the mechanism called “order-then-production” principle. This means electricity should be ordered by end consumers in ad...

Though useful from a clinical and practical standpoint uniform, large-field chromatic stimuli are likely to contain luminance contributions from retinal inhomogeneities. Such contribution can significantly influence psychophysical thresholds. However, the degree to which small luminance artifacts influence the chromatic VEP has been debated. In particular, claims have been made that band-pass t...

Visual evoked potentials (VEPs) are useful to evaluate the visual pathway integrity from ganglion cells of the retina to the visual cortex. VEP could be applied to evaluate the eff ects on optic nerve function following ophthalmologic treatments and in toxicity studies. Th e aims of this research were to design a clinical protocol for testing fl ash-VEPs during sedation and dissociative anaesth...

OBJECTIVE Patients with Parkinson's disease (PD) may have sensory dysfunction, and it can be more easily demonstrated through electrophysiologic testing. We aimed to explore whether the impairment of brainstem visual and auditory passageway exists in PD patients using visual evoked potential (VEP) and brainstem auditory evoked potential (BAEP) examinations. METHODS Forty-two PD cases and thir...

Visual perception is mediated by unique contributions of the numerous brain regions that constitute the visual system. We performed simultaneous recordings of local field potentials (LFPs) and single unit activity (SUA) in areas V4 and lateral prefrontal cortex to characterize their contribution to visual processing. Here, we trained monkeys to identify natural images at different degradation l...

Acute exposure to toluene was assessed in two experiments to determine the relationship between brain toluene concentration and changes in neurophysiological function. The concentration of toluene in brain tissue at the time of assessment was estimated using a physiologically based pharmacokinetic model. Brain neurophysiological function was measured using pattern-elicited visual evoked potenti...