Chaos in induced rhythms of the brain – the value of ERP studies

1996 ◽  
Vol 19 (2) ◽  
pp. 305-305 ◽  
Author(s):  
Márk Molnár
Keyword(s):  
Information Processing ◽  
Dimensional Analysis ◽  
Chaos Theory ◽  
Correlation Dimension ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Related Potentials ◽  
Point Correlation ◽  
The Brain ◽  
Objective Investigation

AbstractEvent-related potentials (ERPs) – neglected almost entirely by Wright & Liley – allow objective investigation of information processing in the brain. The application of chaos theory to such an analysis broadens this possibility. Through the use of the point correlation dimension (PD2) accurate dimensional analysis of different Event-Related Potential components such as the P3 wave is possible.

Event-Related Potentials in Psychiatry: Approaches to Research and Clinical Applications

1983 ◽  
Vol 17 (4) ◽  
pp. 307-318 ◽  
Author(s):  
H. G. Stampfer
Keyword(s):  
Information Processing ◽  
Psychiatric Disorders ◽  
Rapid Development ◽  
Event Related Potentials ◽  
Clinical Applications ◽  
Direct Access ◽  
Practical Application ◽  
Clinical Methods ◽  
Related Potentials ◽  
The Brain

This article suggests that the potential usefulness of event-related potentials in psychiatry has not been fully explored because of the limitations of various approaches to research adopted to date, and because the field is still undergoing rapid development. Newer approaches to data acquisition and methods of analysis, combined with closer co-operation between medical and physical scientists, will help to establish the practical application of these signals in psychiatric disorders and assist our understanding of psychophysiological information processing in the brain. Finally, it is suggested that psychiatrists should seek to understand these techniques and the data they generate, since they provide more direct access to measures of complex cerebral processes than current clinical methods.

scholarly journals Odor habituation can modulate very early olfactory event-related potential

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Kwangsu Kim ◽  
Jisub Bae ◽  
Youngsun Jin ◽  
Cheil Moon
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
High Temporal Resolution ◽  
Related Potentials ◽  
The Central Nervous System ◽  
The Brain ◽  
Odor Signal ◽  
Behavior Test

Abstract Odor habituation is a phenomenon that after repeated exposure to an odor, is characterized by decreased responses to it. The central nervous system is involved in odor habituation. To study odor habituation in humans, measurement of event-related potentials (ERPs) has been widely used in the olfactory system and other sensory systems, because of their high temporal resolution. Most previous odor habituation studies have measured the olfactory ERPs of (200–800) ms. However, several studies have shown that the odor signal is processed in the central nervous system earlier than at 200 ms. For these reasons, we studied whether when odors were habituated, olfactory ERP within 200 ms of odors could change. To this end, we performed an odor habituation behavior test and electroencephalogram experiments. In the behavior test, under habituation conditions, odor intensity was significantly decreased. We found significant differences in the negative and positive potentials within 200 ms across the conditions, which correlated significantly with the results of the behavior test. We also observed that ERP latency depended on the conditions. Our study suggests that odor habituation can involve the olfactory ERP of odors within 200 ms in the brain.

scholarly journals Preattentive Sensory Processing as Indexed by the MMN and P3a Brain Responses is Associated with Cognitive and Psychosocial Functioning in Healthy Adults

2007 ◽  
Vol 19 (10) ◽  
pp. 1624-1632 ◽  
Author(s):  
Gregory A. Light ◽  
Neal R. Swerdlow ◽  
David L. Braff
Keyword(s):  
Information Processing ◽  
Cognitive Abilities ◽  
Psychosocial Functioning ◽  
Memory Performance ◽  
Sensory Information ◽  
Event Related Potentials ◽  
Higher Order ◽  
Event Related Potential ◽  
Cognitive Operations ◽  
Related Potentials

Understanding the basic neural processes that underlie complex higher order cognitive operations and psychosocial functioning is a fundamental goal of cognitive neuroscience. Event-related potentials allow investigators to probe the earliest stages of information processing. Mismatch negativity (MMN) and P3a are auditory event-related potential components that reflect automatic sensory discrimination. The aim of the present study was to determine if MMN and P3a are associated with higher order cognitive operations and psychosocial functioning in clinically normal healthy subjects. Twenty adults were assessed using standardized clinical, cognitive, and psychosocial functional instruments. All individuals were within the normal range on cognitive tests and functional ratings. Participants were also tested on a duration-deviant MMN/P3a paradigm (50-msec standard tones, p = .90; 100-msec deviant tones, p = .10; stimulus onset asynchrony [SOA] = 505 msec). Across fronto-central electrode regions, significant correlations were observed between psychosocial functioning and MMN (r = −.62, p < .01) and P3a (r = .63, p < .01) amplitudes. P3a amplitude was also highly associated with immediate and delayed recall of verbal information with robust correlations widely distributed across fronto-central recording areas (e.g., r = .72, p < .001). The latency of the P3a response was significantly associated with both working memory performance (r = −.53, p < .05) and functional ratings (r = −.48, p < .05). Neurophysiological measures of relatively automatic auditory sensory information processing are associated with higher order cognitive abilities and psychosocial functioning in normal subjects. Efficiency at elementary levels of information processing may underlie the successful encoding, retrieval, and discrimination of task-relevant information, which, in turn, facilitates the iterative and responsive processing necessary for adaptive cognitive and social functioning.

scholarly journals Can ambient odors influence the recognition of emotional words? A behavioral and event-related potentials study

2021 ◽  
Author(s):  
Danyang Li ◽  
Xiaochun Wang
Keyword(s):  
Event Related Potentials ◽  
Event Related Potential ◽  
Emotional Words ◽  
N400 Amplitude ◽  
Early Posterior Negativity ◽  
Unpleasant Odor ◽  
Related Potentials ◽  
Pleasant Odor ◽  
Left And Right ◽  
The Brain

AbstractOdor context can affect the recognition of facial expressions. However, there is no evidence to date that odor can regulate the processing of emotional words conveyed by visual words. An emotional word recognition task was combined with event-related potential technology. Briefly, 49 adults were randomly divided into three odor contexts (pleasant odor, unpleasant odor, and no odor) to judge the valence of emotional words (positive, negative, and neutral). Both behavioral and Electroencephalography (EEG) data were collected. Both the pleasant odor and unpleasant odor contexts shortened the response time of the subjects to emotional words. In addition, negative words induced greater amplitudes of early posterior negativity (EPN) and late positive potential (LPP) than the positive and neutral words. However, the neutral words induced a larger N400 amplitude than the positive and negative words. More importantly, the processing of emotional words was found to be modulated by external odor contexts. For example, during the earlier (P2) processing stages, pleasant and unpleasant odor contexts induced greater P2 amplitudes than the no odor context. In the unpleasant odor context, negative words with the same odor valence induced greater P2 amplitudes than the positive words. During the later (N400) stages, various regions of the brain regions exhibited different results. For example, in the left and right frontal areas of the brain, exposure to positive words in a pleasant odor context resulted in a smaller N400 amplitude than exposure to neutral words in the same context. Meanwhile, in the left and right central regions, emotional words with the same valence as pleasant or unpleasant odor contexts elicited the minimum N400 amplitude. Individuals are very sensitive to emotional information. With deeper processing, different cognitive processes are reflected and they can be modulated by external odors. In the early and late stages of word processing, both pleasant and unpleasant odor contexts exhibited an undifferentiated dominance effect and could specifically modulate affectively congruent words.

Bringing Brain Events to Mind: Functional Systems and Brain Event-Related Potentials

2001 ◽  
Vol 15 (2) ◽  
pp. 69-79 ◽  
Author(s):  
Richard C. Howard
Keyword(s):  
Conscious Experience ◽  
Event Related Potentials ◽  
Functional System ◽  
Event Related Potential ◽  
Functional Systems ◽  
Royal Road ◽  
Related Potentials ◽  
Systems Framework ◽  
Goal Directed Behavior ◽  
The Brain

Abstract This paper integrates recent brain event-related potential (ERP) data within a functional systems framework. Atripartite division of the brain into cognitive, motoric, and affective/somatic functional systems is proposed. Each functional system contributes separately to conscious experience and each has its own inputs/outputs and associated memory system. It is suggested that brain ERPs reflect computations common to all three functional systems, but that they differ in terms of the specific inputs and outputs, unique to each functional system, upon which the computations are carried out. Outputs from each functional system are fed to the prefrontal cortex, which is suggested as acting as a superordinate functional system mediating goal-directed behavior, with its coherent behavioral outputs - cognitive, motoric and affective/somatic - gaining access to consciousness. It is argued that ERPs are not a royal road to the conscious mind.

Age and Information Processing

1997 ◽  
Vol 2 (3) ◽  
pp. 247-257 ◽  
Author(s):  
István Czigler ◽  
Gergely Csibra ◽  
Ágnes Ambró
Keyword(s):  
Information Processing ◽  
Event Related Potentials ◽  
The Elderly ◽  
Human Information Processing ◽  
Attentional Processes ◽  
Age Related ◽  
Related Potentials ◽  
Effects Of Aging ◽  
Identification Processes ◽  
The Brain

This paper reviews our recent studies on the effects of aging on human information processing. In these studies the event-related potentials of the brain (ERPs) recorded in visual discrimination tasks were compared in younger and older groups of subjects in four experiments. We obtained a slight age-related delay of the NA component of the ERP. This component is a correlate of elementary pattern-identification processes. Obvious latency differences appeared on the anterior positivity, selection negativity, and N2b components in tasks where the target stimuli were defined by two stimulus characteristics. These components are correlates of attentional processes, i.e., the results support the view emphasizing age-related decline of the attentional processes. In the elderly the late positivity was less sensitive to stimulus probability, and in the older groups this component was more evenly distributed over the scalp. These results are considered as an indication that the structure of stimulus sequences was less efficiently represented in the older subjects.

Modulation of forgiveness on processing hurt situations: A study of event-related potentials

2018 ◽  
Vol 46 (4) ◽  
pp. 607-616
Author(s):  
Yangen Zhou ◽  
Jiamei Lu ◽  
Xiaochen Tang ◽  
Chaoyi Hu ◽  
Haibin Wang
Keyword(s):  
Information Processing ◽  
University Students ◽  
Late Stage ◽  
Time Course ◽  
Event Related Potentials ◽  
Positive Component ◽  
Late Positive Component ◽  
Stimulus Evaluation ◽  
Related Potentials ◽  
The Brain

To explore the neuro-mechanism of the time course of processing a hurt situation, we analyzed event-related potentials (ERPs) generated in the brain in response to stimuli in individuals with different degrees of forgiveness. Participants were 216 university students. Of the early ERP components, the negative-deflecting N1 was modulated neither by degree of forgiveness nor by the hurt situation, and the positive-deflecting P2 was larger for low-forgiveness than for high-forgiveness participants, and for low-hurt than for high-hurt situations. The N2, which identifies and encodes stimulus, was enhanced in the high-forgiveness group and for high-hurt situations. Importantly, the late positive component (LPC) stage of stimulus evaluation was larger in the high-forgiveness group for high-hurt situations, but in the low-forgiveness group was evident for low-hurt situations. These data indicate that the modulation of forgiveness on processing hurt situations occurs at the late stage of information processing.

Bringing the brain into personality assessment: Is there a place for event-related potentials?

2019 ◽  
Vol 31 (4) ◽  
pp. 488-501 ◽  
Author(s):  
Takakuni Suzuki ◽  
Kaylin E. Hill ◽  
Belel Ait Oumeziane ◽  
Dan Foti ◽  
Douglas B. Samuel
Keyword(s):  
Personality Assessment ◽  
Event Related Potentials ◽  
Related Potentials ◽  
The Brain

Neural dynamics of trainee teachers' emotional conflict processing: An event-related potential study

2019 ◽  
Vol 47 (7) ◽  
pp. 1-9
Author(s):  
Li Jin ◽  
Xu Li ◽  
Jiamei Lu ◽  
Nianqu Chen ◽  
Lin Cheng ◽  
...  
Keyword(s):  
School Context ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
The Body ◽  
Educational Context ◽  
Congruent Condition ◽  
Slow Potential ◽  
Emotional Conflict ◽  
Trainee Teachers ◽  
Related Potentials

We investigated emotional conflict in an educational context with an emotional body–word Stroop paradigm, examining whether the N450 (a late fronto-central phasic negative event-related potential signature) and slow potential (SP) effects could be evoked in trainee teachers. The N450 effect is characterized by topography and negative polarity of an incongruent minus congruent difference potential, and the SP effect has positive polarity (incongruent minus congruent difference potential). Positive and negative body language examples were obtained from pupils in an actual school context, and emotional words were selected. Compound stimuli were presented, each comprising a congruent or incongruent word displayed across a body image. Event-related potentials were recorded while participants judged body expression valence. Reaction times were longer and accuracies were lower for the incongruent compared to the congruent condition. The N450 component amplitude in the incongruent condition was more negative than in the congruent condition. Results showed a behavioral interference effect and an N450 effect for trainee teachers in this context, thus indicating that the body–word task was efficient in assessing emotional conflict in an educational context, and trainee teachers' perception of body expressions of students could be influenced by emotional signals. The findings further the understanding of emotional conflict in an educational context.

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