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

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.

Time-of-Day Preference, Pattern Evoked Potentials, and Hemispheric Asymmetries: A Preliminary Statement

7 “morning-type” and 6 “evening-type” individuals were subjected to pattern reversal steady-state Event-related Potentials (ERPs) recording to obtain data with respect to time of day, diurnal typology, and hemispheric asymmetries. A significant interaction between these factors suggested a model of hemispheric functioning much more complex than suspected.