608 results match your criteria averaged event-related


Effect of Acute Psychological Stress on Motion-in-Depth Perception: An Event-Related Potential Study.

Adv Cogn Psychol 2020 16;16(4):353-362. Epub 2020 Dec 16.

Department of Psychology, Wuhan Institute of Physical Education, Wuhan, China2.

The present study explored the intrinsic event-related potential (ERP) features of the effects of acute psychological stress on the processing of motion-in-depth perception using a dual-task paradigm. After a mental arithmetic task was used to induce acute psychological stress, a collision task was used to evaluate motion-in-depth perception. The error value and average amplitude of late slow waves (SW) were significantly larger for the earlier colliding spheres' than for the later colliding spheres. Read More

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December 2020

Selective Devaluation Affects the Processing of Preferred Rewards.

Cogn Affect Behav Neurosci 2021 Apr 30. Epub 2021 Apr 30.

Department of Biological Psychology, Institute of Experimental Psychology, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, Düsseldorf, 40225, Germany.

The present study investigated whether the representation of subjective preferences in the event-related potential is manipulable through selective devaluation, i.e., the consumption of a specific food item until satiety. Read More

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EEG measures for clinical research in major vascular cognitive impairment: recommendations by an expert panel.

Neurobiol Aging 2021 Jul 10;103:78-97. Epub 2021 Mar 10.

Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales; Neuropsychiatric Institute, The Prince of Wales Hospital, Sydney, Australia.

Vascular contribution to cognitive impairment (VCI) and dementia is related to etiologies that may affect the neurophysiological mechanisms regulating brain arousal and generating electroencephalographic (EEG) activity. A multidisciplinary expert panel reviewed the clinical literature and reached consensus about the EEG measures consistently found as abnormal in VCI patients with dementia. As compared to cognitively unimpaired individuals, those VCI patients showed (1) smaller amplitude of resting state alpha (8-12 Hz) rhythms dominant in posterior regions; (2) widespread increases in amplitude of delta (< 4 Hz) and theta (4-8 Hz) rhythms; and (3) delayed N200/P300 peak latencies in averaged event-related potentials, especially during the detection of auditory rare target stimuli requiring participants' responses in "oddball" paradigms. Read More

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Standardized measurement error: A universal metric of data quality for averaged event-related potentials.

Psychophysiology 2021 Jun 29;58(6):e13793. Epub 2021 Mar 29.

Department of Psychology, University of California, Davis, CA, USA.

Event-related potentials (ERPs) can be very noisy, and yet, there is no widely accepted metric of ERP data quality. Here, we propose a universal measure of data quality for ERP research-the standardized measurement error (SME)-which is a special case of the standard error of measurement. Whereas some existing metrics provide a generic quantification of the noise level, the SME quantifies the data quality (precision) for the specific amplitude or latency value being measured in a given study (e. Read More

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Experimental sleep restriction increases latency jitter in pain elicited cortical responses.

Heliyon 2021 Feb 12;7(2):e06188. Epub 2021 Feb 12.

National Institute of Occupational Health, Department of Work Psychology and Physiology, Gydas vei 8, 0363, Oslo, Norway.

Objective: Previous studies have shown increased pain scores to painful stimulation after experimental sleep restriction, but reduced or unchanged magnitude of the event related potentials (ERPs) when averaged in the time-domain. However, some studies found increased response magnitude when averaging in the time-frequency domain. The aim of this study was to determine whether ERP-latency jitter may contribute to this discrepancy. Read More

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February 2021

Analysing spectral changes over time to identify articulatory impairments in dysarthria.

J Acoust Soc Am 2021 Feb;149(2):758

LPP, UMR 7018, CNRS/University Sorbonne-Nouvelle, Paris, France.

Identifying characteristics of articulatory impairment in speech motor disorders is complicated due to the time-consuming nature of kinematic measures. The goal is to explore whether analysing the acoustic signal in terms of total squared changes of Mel-Frequency Cepstral Coefficients (TSC_MFCC) and its pattern over time provides sufficient spectral information to distinguish mild and moderate dysarthric French speakers with Amyotrophic Lateral Sclerosis (ALS) and Parkinson's Disease (PD) from each other and from healthy speakers. Participants produced the vowel-glide sequences /ajajaj/, /ujujuj/, and /wiwiwi/. Read More

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February 2021

Conflict Processing in Schizophrenia: Dissociable neural mechanisms revealed by the N2 and frontal midline theta.

Neuropsychologia 2021 05 18;155:107791. Epub 2021 Feb 18.

Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China. Electronic address:

Deficits in executive control have long been regarded as one of the hallmark cognitive characteristics in people with schizophrenia (SZ), and current neurocognitive models of SZ generally regard the dysfunctional anterior cingulate cortex (ACC) as the possible neural mechanism. This however, contrasts with recent studies showing that conflict processing, a key component of executive functions that relies on ACC, remains relatively intact in SZ. The current study aimed to investigate this issue through two well-known electrophysiological signatures of conflict processing that have been suggested to originate from ACC, i. Read More

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Can Event-Related Potentials Evoked by Heel Lance Assess Pain Processing in Neonates? A Systematic Review.

Children (Basel) 2021 Jan 20;8(2). Epub 2021 Jan 20.

Division of Nursing Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan.

To clarify the possibility of event-related potential (ERP) evoked by heel lance in neonates as an index of pain assessment, knowledge acquired by and problems of the methods used in studies on ERP evoked by heel lance in neonates were systematically reviewed, including knowledge about Aδ and C fibers responding to noxious stimuli and Aβ fibers responding to non-noxious stimuli. Of the 863 reports searched, 19 were selected for the final analysis. The following points were identified as problems for ERP evoked by heel lance in neonates to serve as a pain assessment index: (1) It is possible that the ERP evoked by heel lance reflected the activation of Aβ fibers responding to non-noxious stimuli and not the activation of Aδ or C fibers responding to noxious stimulation; (2) Sample size calculation was presented in few studies, and the number of stimulation trials to obtain an averaged ERP was small. Read More

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January 2021

Why do humans have unique auditory event-related fields? Evidence from computational modeling and MEG experiments.

Psychophysiology 2021 Apr 21;58(4):e13769. Epub 2021 Jan 21.

Leibniz Institute for Neurobiology, Research Group Comparative Neuroscience, Magdeburg, Germany.

Auditory event-related fields (ERFs) measured with magnetoencephalography (MEG) are useful for studying the neuronal underpinnings of auditory cognition in human cortex. They have a highly subject-specific morphology, albeit certain characteristic deflections (e.g. Read More

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Reduced Visual Magnocellular Event-Related Potentials in Developmental Dyslexia.

Authors:
John Stein

Brain Sci 2021 Jan 5;11(1). Epub 2021 Jan 5.

Deptment Physiology, Anatomy & Genetics, University of Oxford, Oxford OX1 3PT, UK.

(1) Background-the magnocellular hypothesis proposes that impaired development of the visual timing systems in the brain that are mediated by magnocellular (M-) neurons is a major cause of dyslexia. Their function can now be assessed quite easily by analysing averaged visually evoked event-related potentials (VERPs) in the electroencephalogram (EEG). Such analysis might provide a useful, objective biomarker for diagnosing developmental dyslexia. Read More

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January 2021

Accurate hemodynamic response estimation by removal of stimulus-evoked superficial response in fNIRS signals.

J Neural Eng 2021 Jan 13. Epub 2021 Jan 13.

Information Engineering, University of Padua, via G. Gradenigo, 6/b, Padova, I-35131, ITALY.

We address the problem of hemodynamic response estimation when task-evoked extra-cerebral components are present in functional near-infrared spectroscopy (fNIRS) signals. These components might bias the hemodynamic response estimation, therefore careful and accurate denoising of data is needed.We propose a dictionary-based algorithm to process every single event-related segment of the acquired signal for both long separation and short separation channels. Read More

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January 2021

Abnormal microscale neuronal connectivity triggered by a proprioceptive stimulus in dystonia.

Sci Rep 2020 11 27;10(1):20758. Epub 2020 Nov 27.

Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 9RX, UK.

We investigated modulation of functional neuronal connectivity by a proprioceptive stimulus in sixteen young people with dystonia and eight controls. A robotic wrist interface delivered controlled passive wrist extension movements, the onset of which was synchronised with scalp EEG recordings. Data were segmented into epochs around the stimulus and up to 160 epochs per subject were averaged to produce a Stretch Evoked Potential (StretchEP). Read More

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November 2020

Reliability of P3 Event-Related Potential During Working Memory Across the Spectrum of Cognitive Aging.

Front Aging Neurosci 2020 19;12:566391. Epub 2020 Oct 19.

University of Kansas Alzheimer's Disease Center, University of Kansas Medical Center, Kansas City, KS, United States.

Event-related potentials (ERPs) offer unparalleled temporal resolution in tracing distinct electrophysiological processes related to normal and pathological cognitive aging. The stability of ERPs in older individuals with a vast range of cognitive ability has not been established. In this test-retest reliability study, 39 older individuals (age 74. Read More

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October 2020

Reliability of mismatch negativity event-related potentials in a multisite, traveling subjects study.

Clin Neurophysiol 2020 12 22;131(12):2899-2909. Epub 2020 Oct 22.

San Francisco Veterans Affairs Healthcare System, San Francisco, CA, United States; Department of Psychiatry, University of California, San Francisco, CA, United States. Electronic address:

Objective: To determine the optimal methods for measuring mismatch negativity (MMN), an auditory event-related potential (ERP), and quantify sources of MMN variance in a multisite setting.

Methods: Reliability of frequency, duration, and double (frequency + duration) MMN was determined from eight traveling subjects, tested on two occasions at eight laboratory sites. Deviant-specific variance components were estimated for MMN peak amplitude and latency measures using different ERP processing methods. Read More

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December 2020

Differences in Power Spectral Densities and Phase Quantities Due to Processing of EEG Signals.

Sensors (Basel) 2020 Nov 4;20(21). Epub 2020 Nov 4.

School of Biomedical Engineering, University of Sydney, Sydney, NSW 2006, Australia.

There has been a growing interest in computational electroencephalogram (EEG) signal processing in a diverse set of domains, such as cortical excitability analysis, event-related synchronization, or desynchronization analysis. In recent years, several inconsistencies were found across different EEG studies, which authors often attributed to methodological differences. However, the assessment of such discrepancies is deeply underexplored. Read More

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November 2020

Characterizing the brain's dynamical response from scalp-level neural electrical signals: a review of methodology development.

Cogn Neurodyn 2020 Dec 4;14(6):731-742. Epub 2020 Sep 4.

Department of Physics, Centre for Nonlinear Studies, Institute of Computational and Theoretical Studies, Hong Kong Baptist University, Kowloon Tong, Hong Kong.

The brain displays dynamical system behaviors at various levels that are functionally and cognitively relevant. Ample researches have examined how the dynamical properties of brain activity reflect the neural cognitive working mechanisms. A prevalent approach in this field is to extract the trial-averaged brain electrophysiological signals as a representation of the dynamical response of the complex neural system to external stimuli. Read More

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December 2020

Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults.

Front Neurosci 2020 23;14:544472. Epub 2020 Sep 23.

Department of Psychology, University of Nevada, Reno, Reno, NV, United States.

Studies of compensatory plasticity in early deaf (ED) individuals have mainly focused on unisensory processing, and on spatial rather than temporal coding. However, precise discrimination of the temporal relationship between stimuli is imperative for successful perception of and interaction with the complex, multimodal environment. Although the properties of cross-modal temporal processing have been extensively studied in neurotypical populations, remarkably little is known about how the loss of one sense impacts the integrity of temporal interactions among the remaining senses. Read More

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September 2020

Neurophysiological parameters of sensory perception and cognition among different modalities of learners.

J Educ Health Promot 2020 30;9:162. Epub 2020 Jun 30.

Department of Physiology, AIIMS, Bhopal, Madhya Pradesh, India.

Introduction: Different types of learners based on sensory modalities are observed. Cognition or physiological alterations in the sensory pathways might play its role in different modalities of visual, auditory, read and write, and kinesthetic learners which are based on different sensory modalities of perception.

Objective: The objective of this study is to ascertain an objective parameter (neurophysiological parameters) for the classification of learners based on their preferred sensory modality. Read More

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Event-related potentials in a two-choice oddball task of impaired behavioral inhibitory control among males with tendencies towards cybersex addiction.

J Behav Addict 2020 Oct 8;9(3):785-796. Epub 2020 Sep 8.

Background And Aims: Impaired behavioral inhibitory control (BIC) is known to play a crucial role in addictive behavior. However, research has been inconclusive as to whether this is also the case for cybersex addiction. This study aimed to investigate the time course of BIC in male individuals with tendencies towards cybersex addiction (TCA) using event-related potentials (ERPs) and to provide neurophysiological evidence of their deficient BIC. Read More

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October 2020

Improving the Cross-Subject Performance of the ERP-Based Brain-Computer Interface Using Rapid Serial Visual Presentation and Correlation Analysis Rank.

Front Hum Neurosci 2020 31;14:296. Epub 2020 Jul 31.

Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China.

The brain-computer interface (BCI) is a system that is designed to provide communication channels to anyone through a computer. Initially, it was suggested to help the disabled, but actually had been proposed a wider range of applications. However, the cross-subject recognition in BCI systems is difficult to break apart from the individual specific characteristics, unsteady characteristics, and environmental specific characteristics, which also makes it difficult to develop highly reliable and highly stable BCI systems. Read More

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Decoding Hearing-Related Changes in Older Adults' Spatiotemporal Neural Processing of Speech Using Machine Learning.

Front Neurosci 2020 16;14:748. Epub 2020 Jul 16.

Institute for Intelligent Systems, University of Memphis, Memphis, TN, United States.

Speech perception in noisy environments depends on complex interactions between sensory and cognitive systems. In older adults, such interactions may be affected, especially in those individuals who have more severe age-related hearing loss. Using a data-driven approach, we assessed the temporal ( in time) and spatial ( in the brain) characteristics of cortical speech-evoked responses that distinguish older adults with or without mild hearing loss. Read More

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Neurophysiologic evidence for increased retrieval suppression among negative ruminators.

Brain Behav 2020 09 3;10(9):e01748. Epub 2020 Aug 3.

Department of Psychological Science, University of North Carolina, Charlotte, NC, USA.

Introduction: Events (e.g., seeing a familiar face) may initiate retrieval of associated information (e. Read More

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September 2020

Independent Low-Rank Matrix Analysis-Based Automatic Artifact Reduction Technique Applied to Three BCI Paradigms.

Front Hum Neurosci 2020 9;14:173. Epub 2020 Jun 9.

Artificial Intelligence Research Center, Department of Information Technology and Human Factors, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo, Japan.

Electroencephalogram (EEG)-based brain-computer interfaces (BCIs) can potentially enable people to non-invasively and directly communicate with others using brain activities. Artifacts generated from body activities (e.g. Read More

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[Detection rates of chemosensory evoked Potenzials with healthy and anosmic subjects].

Laryngorhinootologie 2020 11 22;99(11):803-810. Epub 2020 Jun 22.

Klinik für Hals-, Nasen- und Ohrenkrankheiten, Jena University Hospital, Jena, Germany.

Background: The detection rate of olfactory chemosensory event-related EEG Potentials (oCSERP) and trigeminal chemosensory event-related EEG Potentials (tCSERP) is also dependent on the stimulants and the evaluator of the averaged EEG curves.

Methods: In 45 subjects with age-appropriate normal olfactory capacity (NP) and 20 anosmics (AN), oCSERP (stimulation by hydrogen sulphide, HS 6 ppm and phenylethyl alcohol, PEA 30 % v/v,) and tCSERP (irritation with CO 20-60 % v/v, intensity standardized) were derived by default. Two investigators categorized the averaged EEG curves in: CSERP recognizable, no CSERP recognizable and artefact. Read More

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November 2020

Evoked and induced EEG oscillations to visual targets reveal a differential pattern of change along the spectrum of cognitive decline in Alzheimer's Disease.

Int J Psychophysiol 2020 09 6;155:41-48. Epub 2020 Jun 6.

Istanbul University, Istanbul Faculty of Medicine, Department of Physiology, Turkey; Istanbul University, Hulusi Behcet Life Sciences Research Center, Turkey. Electronic address:

In recent years, quantitative variables derived from the electroencephalogram (EEG) attract an increasing interest for the evaluation of neurodegenerative diseases, as EEG registers the neuro-electric activity with a high temporal resolution and provides a cost-effective and easily accessible, non-invasive method. Event-related oscillations (EROs) as oscillatory responses in the EEG to specific events further provide the possibility to track the cognitive decline in a task-specific manner. Current study in search for potential ERO biomarkers to distinguish different stages of cognitive decline along the Alzheimer's Disease (AD) continuum re-analyzed a combined set of data collected and analyzed in previous studies by Başar and coworkers. Read More

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September 2020

Using correlation analysis to assess the reliability of evoked potential components identified by signal averaging.

J Neurosci Methods 2020 07 1;340:108752. Epub 2020 May 1.

Dipartimento di Neuroscienze (DINOGMI), Università degli Studi di Genova, Largo P. Daneo 3, Genova, I-16132, Italy. Electronic address:

Background: Signal averaging is the conventional method of enhancing the signal-to-noise ratio in recordings of evoked potentials (EPs) from the skin surface in humans. However there may be difficulties in reliably identifying the features of interest especially when a low number of trials are averaged or when large artefacts with similar waveform as the signal are present.

New Method: This method uses the median cross-correlation coefficient of every possible pair of recording repetitions within user-defined windows across the time course of the evoked potential. Read More

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Intra- and Inter-Rater Reliability of Manual Feature Extraction Methods in Movement Related Cortical Potential Analysis.

Sensors (Basel) 2020 Apr 24;20(8). Epub 2020 Apr 24.

Health and Rehabilitation Research Institute, Auckland University of Technology, Auckland 0627, New Zealand.

Event related potentials (ERPs) provide insight into the neural activity generated in response to motor, sensory and cognitive processes. Despite the increasing use of ERP data in clinical research little is known about the reliability of human manual ERP labelling methods. Intra-rater and inter-rater reliability were evaluated in five electroencephalography (EEG) experts who labelled the peak negativity of averaged movement related cortical potentials (MRCPs) derived from thirty datasets. Read More

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GRM8 genotype is associated with externalizing disorders and greater inter-trial variability in brain activation during a response inhibition task.

Clin Neurophysiol 2020 06 2;131(6):1180-1186. Epub 2020 Apr 2.

Department of Psychiatry, University of Connecticut School of Medicine, 263 Farmington Avenue, Farmington, CT 06030-1410, USA.

Objective: The present investigation tested the association of a novel measure of brain activation recorded during a simple motor inhibition task with a GRM8 genetic locus implicated in risk for substance dependence.

Methods: 122 European-American adults were genotyped at rs1361995 and evaluated against DSM-IV criteria for Alcohol Dependence, Cocaine Dependence, Conduct Disorder, and Antisocial Personality Disorder. Also, their brain activity was recorded in response to rare, so-called "No-Go" stimuli presented during a continuous performance test. Read More

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ReSync: Correcting the trial-to-trial asynchrony of event-related brain potentials to improve neural response representation.

Authors:
Guang Ouyang

J Neurosci Methods 2020 06 9;339:108722. Epub 2020 Apr 9.

Faculty of Education, The University of Hong Kong, Pokfulam, Hong Kong Island, Hong Kong. Electronic address:

Background: For various reasons, the brain response activities in electroencephalography (EEG) signals are not perfectly synchronized between trials with respect to event markers-a problem commonly referred to as latency jitter. Experimental technologies have been greatly advanced to reduce technical timing errors and thereby reduce jitter. However, there remain intrinsic sources of jitter that are difficult to remove. Read More

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Computer data simulator to assess the accuracy of estimates of visual N2/N2pc event-related potential components.

J Neural Eng 2020 06 22;17(3):036024. Epub 2020 Jun 22.

Department of Information Engineering-DEI, University of Padova, Padova, Italy.

Objective: Event-related potentials (ERPs) evoked by visual stimulations comprise several components, with different amplitudes and latencies. Among them, the N2 and N2pc components have been demonstrated to be a measure of subjects' allocation of visual attention to possible targets and to be involved in the suppression of irrelevant items. Unfortunately, the N2 and N2pc components have smaller amplitudes compared with those of the background electroencephalogram (EEG), and their measurement requires employing techniques such as conventional averaging, which in turn necessitates several sweeps to provide acceptable estimates. Read More

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