Electroencephalograms (EEGs) and Eventrelated potentials (ERP) have long been used to observe the human visual perception process, such as the human response to letters, Kanji characters and symbols. This paper examines the possibility of classifying characters when viewed by subjects in single trials using single-channel EEG waveforms of the frontal area (Fz) and the occipital area (Oz) of the...

Despite nearly a century of electrophysiological studies recording extracranially from humans and intracranially from monkeys, the neural generators of nearly all human event-related potentials (ERPs) have not been definitively localized. We recorded an attention-related ERP component, known as the N2pc, simultaneously with intracranial spikes and local field potentials (LFPs) in macaques to te...

Deferred imitation (DI) is an established procedure for behavioral measurement of early declarative-like memories in infancy and previous work has indicated a link between this type of memory and brain potentials in infants. The present study compared infants' memory performance in this paradigm with electrophysiological indices of associative learning. Thirty children (M = 14.5 months) partici...

Objective: To examine the effect of the active task involvement versus the passive knowledge of the structure of the stimulation on eventrelated potentials (ERPs) to violation in number sequences. This should contribute to future development of an ERP test for neurological patients. Methods: ERPs were recorded in subjects who listened to 4-item sequences of numbers incrementing by one. Half of ...

Ivannikov, Andriy Extraction of Event-Related Potentials from Electroencephalography Data Jyväskylä: University of Jyväskylä, 2009, 108 p.(+included articles) (Jyväskylä Studies in Computing ISSN 1456-5390; 109) ISBN 978-951-39-3742-3 Finnish summary Diss. The researchwork reported in this thesis addresses the issues related to denoising of event-related potentials (ERP) in multichannel electro...

We describe a method based on the wavelet transform for denoising single-trial eventrelated potentials (ERPs). The identification of the event-related responses in the single-trials allows the study of latency jitters and cognitive processes, such as habituation, sensitization and learning. Since the method is fast and parameter free, it could complement ERP conventional analysis. D 2004 Elsevi...

Event related potentials (ERPs) are very feeble alterations in the ongoing electroencephalogram (EEG) and their detection is a challenging problem. Based on the unique time-based parameters derived from wavelet coefficients and the asymmetry property of wavelets a novel algorithm to separate ERP components in single-trial EEG data is described. Though illustrated as a specific application to N1...

INTRODUCTION We investigated whether event-related potentials (ERP) collected in outpatient settings and analyzed with standardized methods can provide a sensitive and reliable measure of the cognitive deficits associated with early Alzheimer's disease (AD). METHODS A total of 103 subjects with probable mild AD and 101 healthy controls were recruited at seven clinical study sites. Subjects we...

Several investigations have shown that emotional events show superior recall than non-emotional ones. However, the cortical mechanisms underlying the episodic recall of emotional scenes are still poorly understood. Our main aim was to compare the magnitude of the Event-Related brain Potentials (ERP) old-new effect related to emotionally unpleasant, pleasant and neutral photographic images. As e...