VEPs and AEPs: Mapping of Occlusive Lesions in Cerebral Vessels

Abstract

The recording of cerebral evoked potentials (EPs) has had a rich history. At the same time, the neuromapper computer produced in the last 10 years increased the possibility of looking into a living brain. These advances were the basis for neuroimaging, neurovisualization, and neuromapping studies. On the one hand, the results of such studies are contradictory, but on the other, these methods are relatively inexpensive compared to computerized tomography, magnetic resonance imaging (or tomography), positron emission tomography, and the like, and they are totally noninvasive.*-'The present study estimates the diagnostic significance of EP mapping and the functional significance of the cortical structure in vascular lesions.

Physiological and Medico-Social Research Trends of the Wave P300 and More Late Components of Visual Event-Related Potentials

“…The appearance of VEP waves above 800 ms is also usually associated with the receipt of new information [7,19,21]. This was especially clearly demonstrated in a series of studies with sequentially presented stimuli [26]. In these experiments, as individual features of objects were presented, waves initially increased from PL 600-700 ms, and then in a time interval 800-1200 ms.…”

“…Some authors believe that waves with a PL of 600-800 ms characterize to a greater extent already known (repeated) images or faces [12,21]. In other studies, it is believed that the components of "late negative" ERP, as well as N400, reflect the processes of processing new unfamiliar information [26]. Of particular interest here are studies of the so-called reaction selection potential.…”

“…Traditionally, the results of evoked potentials studies in brain pathology testify in favor of a reduction in the amplitude and lengthening of the latency of individual components [26]. But, as a rule, these studies are associated only with the assessment of the physical characteristics of the visual, auditory and somatosensory signals, which are reflected in the evoked potential up to 100-150 ms. Assessment of cognitive perception (more than 300 ms) according to ERP data in brain pathology is carried out less frequently.…”

Long-Latency Event-Related Potentials (300–1000 ms) of the Visual Insight

“…The clinical and unscientific use of the term does not require sudden awareness or any concomitant emotional response. Indeed, in clinical psychology, the absence of an emotional response can itself be seen as a symptom indicating a lack of understanding [ 9 , 10 , 11 ].…”

Картирование Мозга При Восприятии Целевой И Нецелевой Акустической Информации

“…Ответные реакции мозга, а именно, слуховые вызванные потенциалы (СВП) (event-related potentials) являются выходными данными. Современные методы картирования головного мозга позволяют исследовать пространственно-временные характеристики ответных реакций мозга на акустические сигналы, а также оценивать механизмы обработки акустической информации [3,8,10,18].…”