scholarly journals The speed of object recognition from a haptic glance: event-related potential evidence

2015 ◽  
Vol 113 (9) ◽  
pp. 3069-3075 ◽  
Author(s):  
Ane Gurtubay-Antolin ◽  
Borja Rodriguez-Herreros ◽  
Antoni Rodríguez-Fornells
Keyword(s):  
Visual Information ◽  
Somatosensory System ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Source Analysis ◽  
Conflict Monitoring ◽  
Fast Recognition ◽  
Wide Range ◽  
Related Potentials ◽  
Exploratory Procedure

Recognition of an object usually involves a wide range of sensory inputs. Accumulating evidence shows that first brain responses associated with the visual discrimination of objects emerge around 150 ms, but fewer studies have been devoted to measure the first neural signature of haptic recognition. To investigate the speed of haptic processing, we recorded event-related potentials (ERPs) during a shape discrimination task without visual information. After a restricted exploratory procedure, participants ( n = 27) were instructed to judge whether the touched object corresponded to an expected object whose name had been previously presented in a screen. We encountered that any incongruence between the presented word and the shape of the object evoked a frontocentral negativity starting at ∼175 ms. With the use of source analysis and L2 minimum-norm estimation, the neural sources of this differential activity were located in higher level somatosensory areas and prefrontal regions involved in error monitoring and cognitive control. Our findings reveal that the somatosensory system is able to complete an amount of haptic processing substantial enough to trigger conflict-related responses in medial and prefrontal cortices in <200 ms. The present results show that our haptic system is a fast recognition device closely interlinked with error- and conflict-monitoring processes.

scholarly journals ERP CORE: An Open Resource for Human Event-Related Potential Research

2020 ◽  
Author(s):  
Emily S. Kappenman ◽  
Jaclyn Farrens ◽  
Wendy Zhang ◽  
Andrew X Stewart ◽  
Steven J Luck
Keyword(s):  
Data Processing ◽  
Brain Activity ◽  
A Priori ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Error Related Negativity ◽  
Wide Range ◽  
Experiment Control ◽  
Related Potentials

Event-related potentials (ERPs) are noninvasive measures of human brain activity that index a range of sensory, cognitive, affective, and motor processes. Despite their broad application across basic and clinical research, there is little standardization of ERP paradigms and analysis protocols across studies. To address this, we created ERP CORE (Compendium of Open Resources and Experiments), a set of optimized paradigms, experiment control scripts, data processing pipelines, and sample data (N = 40 neurotypical young adults) for seven widely used ERP components: N170, mismatch negativity (MMN), N2pc, N400, P3, lateralized readiness potential (LRP), and error-related negativity (ERN). This resource makes it possible for researchers to 1) employ standardized ERP paradigms in their research, 2) apply carefully designed analysis pipelines and use a priori selected parameters for data processing, 3) rigorously assess the quality of their data, and 4) test new analytic techniques with standardized data from a wide range of paradigms.

scholarly journals S46. IMPAIRED ERROR-PROCESSING IN PATIENTS WITH FIRST-EPISODE PSYCHOSIS: AN EVENT-RELATED POTENTIAL STUDY

2020 ◽  
Vol 46 (Supplement_1) ◽  
pp. S50-S50
Author(s):  
Jihye Park ◽  
Minah Kim ◽  
Wu Jeong Hwang ◽  
Jun Soo Kwon
Keyword(s):  
Correct Response ◽  
Event Related Potentials ◽  
First Episode Psychosis ◽  
Electrode Site ◽  
Event Related Potential ◽  
First Episode ◽  
Conflict Monitoring ◽  
Error Related Negativity ◽  
Episode Psychosis ◽  
Related Potentials

Abstract Background Impaired error/conflict monitoring as reflected in the event-related potentials (ERPs) has consistently reported in patients with schizophrenia. However, whether this impairment exist from the early phase of psychosis such as first-episode psychosis (FEP) is not yet been clearly reported. To investigate the presence of error/conflict monitoring deficit in early psychosis, we examined the error-related negativity (ERN), error-related positivity (Pe), and correct-response negativity (CRN) during the Go/Nogo task in the patients with FEP. Methods 25 patients with and 25 age, sex matched healthy controls (HCs) were participated in electroencephalographic recording during the Go/Nogo task. Trials with error response was analyzed to define ERN at Fz electrode site and Pe at Pz electrode site. Trials with correct response was used for CRN analysis at Fz electrode site. Independent samples t-test was used to compare the amplitudes of ERP components between FEP and HC groups. Pearson’s correlation analysis was performed to reveal the relationship of altered ERP component with symptomatic severity in patients with schizophrenia. Results FEP patients showed significantly smaller ERN amplitude at Fz electrode site compared to HCs (t=-3.294, p=0.002). However, there was no difference of CRN (t=0.017, p=0.986) and Pe (t=1.806, p=0.077) amplitudes between FEP and HC groups. There was no significant correlation of symptomatic severity and ERN amplitude at Fz electrode site in FEP patients. Discussion These findings suggest that impairments in error/conflict monitoring as reflected by ERN amplitude exist from the early course of psychotic disorder. Future study with larger sample size and subjects at earlier phase such as clinical high risk for psychosis would be needed to confirm the findings of current study.

scholarly journals Event-related Potential Additivity as an Index of Neural Independence

2019 ◽  
Author(s):  
Geoffrey Valentine ◽  
Margarita Zeitlin ◽  
Chu-Hsuan Kuo ◽  
Lee Osterhout
Keyword(s):  
Temporal Dynamics ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Source Analysis ◽  
Continuous Measure ◽  
Principle Of Superposition ◽  
Feature Similarity ◽  
Related Potentials ◽  
Stimulus Features ◽  
Font Color

Abstract Background Scalp-recorded event-related potentials (ERPs) are poorly suited for certain types of source analysis. For example, it is often difficult to precisely assess whether two ERP waveforms were produced by similar neural sources, especially when the waveforms share the same polarity and a similar scalp topography and temporal dynamics. We report here an alternative method to establishing independence of neural sources grounded in the principle of superposition, which stipulates that electrical fields summate where they intersect in time and space. We assessed the independence of two frequently reported positive waves in the ERP literature, the P300 (elicited by unexpected stimuli) and P600 (elicited by syntactic anomalies). Subjects read sentences that contained a word that was either non-anomalous, unexpected in one feature (capitalized, different font, different font color, or ungrammatical), or unexpected in two features (capitalized and different font style, capitalized and different font color, or capitalized and ungrammatical). Thus, in the double anomaly condition, the similarity between a shared feature (i.e., capitalization) and a second feature was systematically manipulated across conditions from larger degree (i.e., font style) to lesser degree (i.e., ungrammatical) of feature similarity. Results We quantified the degree of source independence for the features of interest by applying a novel Additivity Index, which compares ERPs elicited by the doubly anomalous words to composite waveforms formed by mathematically summing the ERP response to singly anomalous words. The degree of source independence is reflected by the degree of summation, with Additivity scores ranging from 0 (completely non-independent) to 1 (completely independent). The computed Additivity Index values varied with feature similarity in the predicted direction: similar features demonstrated lower Additivity Index values, or lower degrees of independence. On the other hand, dissimilar features manifested robust additivity, resulting in larger AI values. Conclusion We quantified the degree to which the P600 and P300 effects are neurally distinct across stimulus features with varying degrees of similarity by computing a continuous measure of independence via the Additivity Index. These findings indicate that the Additivity Index provides a valid and general method for quantifying the neural independence of scalp-recorded brain potentials.

scholarly journals Predicting Reading From Behavioral and Neural Measures – A Longitudinal Event-Related Potential Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Aleksandra K. Eberhard-Moscicka ◽  
Lea B. Jost ◽  
Moritz M. Daum ◽  
Urs Maurer
Keyword(s):  
Early Stage ◽  
Block Design ◽  
Reading Acquisition ◽  
Event Related Potentials ◽  
First Grade ◽  
Event Related Potential ◽  
Audiovisual Integration ◽  
Behavioral Measures ◽  
Wide Range ◽  
Related Potentials

Fluent reading is characterized by fast and effortless decoding of visual and phonological information. Here we used event-related potentials (ERPs) and neuropsychological testing to probe the neurocognitive basis of reading in a sample of children with a wide range of reading skills. We report data of 51 children who were measured at two time points, i.e., at the end of first grade (mean age 7.6 years) and at the end of fourth grade (mean age 10.5 years). The aim of this study was to clarify whether next to behavioral measures also basic unimodal and bimodal neural measures help explaining the variance in the later reading outcome. Specifically, we addressed the question of whether next to the so far investigated unimodal measures of N1 print tuning and mismatch negativity (MMN), a bimodal measure of audiovisual integration (AV) contributes and possibly enhances prediction of the later reading outcome. We found that the largest variance in reading was explained by the behavioral measures of rapid automatized naming (RAN), block design and vocabulary (46%). Furthermore, we demonstrated that both unimodal measures of N1 print tuning (16%) and filtered MMN (7%) predicted reading, suggesting that N1 print tuning at the early stage of reading acquisition is a particularly good predictor of the later reading outcome. Beyond the behavioral measures, the two unimodal neural measures explained 7.2% additional variance in reading, indicating that basic neural measures can improve prediction of the later reading outcome over behavioral measures alone. In this study, the AV congruency effect did not significantly predict reading. It is therefore possible that audiovisual congruency effects reflect higher levels of multisensory integration that may be less important for reading acquisition in the first year of learning to read, and that they may potentially gain on relevance later on.

scholarly journals Decline in attentional inhibition among migraine patients: an event‐related potential study using the Stroop task

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Min Su ◽  
Rongfei Wang ◽  
Zhao Dong ◽  
Dengfa Zhao ◽  
Shengyuan Yu
Keyword(s):  
Stroop Task ◽  
Event Related Potentials ◽  
Brain Dysfunction ◽  
Event Related Potential ◽  
Control Group ◽  
Healthy Controls ◽  
Conflict Monitoring ◽  
Related Potentials ◽  
Migraine Group ◽  
Attentional Inhibition

Abstract Background As a disorder of brain dysfunction, migraine has been associated with cognitive decline. However, no consistent results with respect to the attention function in migraineurs have been found, and the relationship between attentional inhibition and migraine is also unclear. In this study, the attentional inhibition function was evaluated using event-related potentials (ERPs) while migraine patients and healthy controls were performing the color–word Stroop task. Methods In this study, 75 migraine patients and 41 age-, gender-, and education-matched healthy controls were enrolled. The Stroop task was performed, and both behavioral and ERP data were analyzed. Results As to the behavioral data, the migraine group had a longer reaction time compared to the control group, but no difference in Stroop effect was observed. With respect to ERP components, the amplitudes of both early and late medial frontal negativity (MFN) were decreased in the migraine group. Additionally, obvious differences in the early MFN and sustained potential (SP) amplitudes were found between patients with and without allodynia. Conclusions At the behavioral level, migraine patients exhibited decreased executive ability but no obvious decline in inhibition. By contrast, a decline in attentional inhibition during the migraine interictal phase was confirmed by the analysis of ERP components, mainly those associated with changes in the conflict-monitoring stage, independent of confounding factors such as age, education, medication and mood disorders. Migraine patients with allodynia exhibited some significant differences in early MFN and SP compared to those without, supporting the hypothesis that migraine chronification aggravates the decline in attentional inhibition.

scholarly journals The Tactile-Visual Conflict Processing and Its Modulation by Tactile-Induced Emotional States: An Event-Related Potential Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Chengyao Guo ◽  
Nicolas Dupuis-Roy ◽  
Jun Jiang ◽  
Miaomiao Xu ◽  
Xiao Xiao
Keyword(s):  
Visual Information ◽  
Emotional State ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
State Condition ◽  
Tactile Sensation ◽  
Emotional States ◽  
Conflict Processing ◽  
Related Potentials ◽  
Negative Difference

This experiment used event-related potentials (ERPs) to study the tactile-visual information conflict processing in a tactile-visual pairing task and its modulation by tactile-induced emotional states. Eighteen participants were asked to indicate whether the tactile sensation on their body matched or did not match the expected tactile sensation associated with the object depicted in an image. The type of tactile-visual stimuli (matched vs. mismatched) and the valence of tactile-induced emotional states (positive vs. negative) were manipulated following a 2 × 2 factorial design. Electrophysiological analyses revealed a mismatched minus matched negative difference component between 420 and 620 ms after stimulus onset in the negative tactile-induced emotional state condition. This ND420-620 component was considered as a sign of the cross-modal conflict processing during the processing of incongruent tactile-visual information. In contrast, no significant mismatched minus matched negative difference component was found in the positive tactile-induced emotional state condition. Together, these results support the hypothesis that a positive emotional state induced by a positive tactile stimulation improves tactile-visual conflict processing abilities.

Attention and inhibition in children with ASD, ADHD and co-morbid ASD + ADHD: an event-related potential study

2013 ◽  
Vol 44 (5) ◽  
pp. 1101-1116 ◽  
Author(s):  
C. Tye ◽  
P. Asherson ◽  
K. L. Ashwood ◽  
B. Azadi ◽  
P. Bolton ◽  
...  
Keyword(s):  
Performance Test ◽  
Event Related Potentials ◽  
Continuous Performance Test ◽  
Autism Spectrum ◽  
Event Related Potential ◽  
Attentional Orienting ◽  
Conflict Monitoring ◽  
Response Preparation ◽  
Children With Asd ◽  
Related Potentials

BackgroundSubstantial overlap has been reported between attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD). Deficits in executive function (EF) are characteristic of both disorders but these impairments have not been compared directly across pure and co-morbid cases using event-related potentials (ERPs).MethodBehavioural parameters and ERPs were recorded during a flankered cued-continuous performance test (CPT-OX) administered to 8–13-year-old boys with ASD (n = 19), ADHD (n = 18), co-morbid ASD + ADHD (n = 29) and typically developing controls (TD; n = 26). Preparatory processing (contingent negative variation, CNV) and attentional orienting (Cue-P3) at cues, response execution at targets (Go-P3), inhibitory processing at non-targets (NoGo-P3) and conflict monitoring between target and non-target trials (Go-N2 v. NoGo-N2) were examined.ResultsCategorical diagnoses and quantitative trait measures indicated that participants with ADHD (ADHD/ASD + ADHD) made more omission errors and exhibited increased reaction-time (RT) variability and reduced amplitude of the Cue-P3 and NoGo-P3 compared to TD/ASD participants. Participants with ASD (ASD/ ASD + ADHD) demonstrated reduced N2 enhancement from Go to NoGo trials compared to TD/ADHD participants. Participants with ASD-only displayed enhanced CNV amplitude compared to ASD + ADHD and TD participants.ConclusionsChildren with ADHD show deficits in attentional orienting and inhibitory control whereas children with ASD show abnormalities in conflict monitoring and response preparation. Children with co-morbid ASD + ADHD present as an additive co-occurrence with deficits of both disorders, although non-additive effects are suggested for response preparation. Measuring ERPs that index attention and inhibition is useful in disentangling cognitive markers of ASD and ADHD and elucidating the basis of co-occurring ASD + ADHD to guide clinical assessment.

Investigating the Multimodal Nature of Human Communication

2009 ◽  
Vol 23 (2) ◽  
pp. 63-76 ◽  
Author(s):  
Silke Paulmann ◽  
Sarah Jessen ◽  
Sonja A. Kotz
Keyword(s):  
Visual Information ◽  
Empirical Studies ◽  
Physical Property ◽  
Event Related Potentials ◽  
Accurate Information ◽  
Human Communication ◽  
Channel Condition ◽  
Prosodic Cues ◽  
Early Processing ◽  
Related Potentials

The multimodal nature of human communication has been well established. Yet few empirical studies have systematically examined the widely held belief that this form of perception is facilitated in comparison to unimodal or bimodal perception. In the current experiment we first explored the processing of unimodally presented facial expressions. Furthermore, auditory (prosodic and/or lexical-semantic) information was presented together with the visual information to investigate the processing of bimodal (facial and prosodic cues) and multimodal (facial, lexic, and prosodic cues) human communication. Participants engaged in an identity identification task, while event-related potentials (ERPs) were being recorded to examine early processing mechanisms as reflected in the P200 and N300 component. While the former component has repeatedly been linked to physical property stimulus processing, the latter has been linked to more evaluative “meaning-related” processing. A direct relationship between P200 and N300 amplitude and the number of information channels present was found. The multimodal-channel condition elicited the smallest amplitude in the P200 and N300 components, followed by an increased amplitude in each component for the bimodal-channel condition. The largest amplitude was observed for the unimodal condition. These data suggest that multimodal information induces clear facilitation in comparison to unimodal or bimodal information. The advantage of multimodal perception as reflected in the P200 and N300 components may thus reflect one of the mechanisms allowing for fast and accurate information processing in human communication.

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.

scholarly journals Eliciting and Recording Event Related Potentials (ERPs) in Behaviourally Unresponsive Populations: A Retrospective Commentary on Critical Factors

2021 ◽  
Vol 11 (7) ◽  
pp. 835
Author(s):  
Alexander Rokos ◽  
Richard Mah ◽  
Rober Boshra ◽  
Amabilis Harrison ◽  
Tsee Leng Choy ◽  
...  
Keyword(s):  
Event Related Potentials ◽  
Stimulus Presentation ◽  
Event Related Potential ◽  
Critical Factors ◽  
Healthy Elderly ◽  
States Of Consciousness ◽  
Long Latency ◽  
Eeg Data ◽  
Related Potentials ◽  
The Relationship

A consistent limitation when designing event-related potential paradigms and interpreting results is a lack of consideration of the multivariate factors that affect their elicitation and detection in behaviorally unresponsive individuals. This paper provides a retrospective commentary on three factors that influence the presence and morphology of long-latency event-related potentials—the P3b and N400. We analyze event-related potentials derived from electroencephalographic (EEG) data collected from small groups of healthy youth and healthy elderly to illustrate the effect of paradigm strength and subject age; we analyze ERPs collected from an individual with severe traumatic brain injury to illustrate the effect of stimulus presentation speed. Based on these critical factors, we support that: (1) the strongest paradigms should be used to elicit event-related potentials in unresponsive populations; (2) interpretation of event-related potential results should account for participant age; and (3) speed of stimulus presentation should be slower in unresponsive individuals. The application of these practices when eliciting and recording event-related potentials in unresponsive individuals will help to minimize result interpretation ambiguity, increase confidence in conclusions, and advance the understanding of the relationship between long-latency event-related potentials and states of consciousness.

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