scholarly journals Study of interhemispheric interaction by the indices of event-related potentials

2020 ◽  
Vol 81 (2) ◽  
pp. 21-25
Author(s):  
G. Antsukh ◽  
T. Kutsenko ◽  
D. Nasiedkin ◽  
A. Pohrebna
Keyword(s):  
Left Hemisphere ◽  
Cognitive Task ◽  
Event Related Potentials ◽  
Anterior Cingulate ◽  
Previous Hypothesis ◽  
Contralateral Hand ◽  
Related Potentials ◽  
Reliable Marker ◽  
Irrelevant Color ◽  
The Right

The study used a combined Stroop test involving a spatial feature. Stimuli (the words "green", "red", "blue" and "yellow", written in relevant or irrelevant color) were presented to the right or left of the center of the screen. In the case of coincidence of the color of the word and its semantic meaning, it was necessary to press the button with the ipsilateral hand (answer "yes", congruent stimulus), discrepancies – with the contralateral hand (answer "no", incongruent stimulus). According to the results obtained earlier, it was suggested that it is easier to transfer information from the left hemisphere to the right than in the opposite direction, and the dominance of the left hemisphere when performing this type of cognitive task. To study this hypothesis, records of event-related potentials (ERP) were obtained when subjects performed this test. The subjects were 7 men, right-handed, aged 20 ± 1,13 years. The most informative was the registration from Cz, for which the components N450 and late positive complex (LPC) were obtained when stimulated by incongruent stimuli from the right side. The N450 component is associated with anterior cingulate cortex activity and is considered a reliable marker of conflict present in the experimental paradigm of this test. LPC is probably a component specific to the Stroop task and corresponds to the level of conflict of stimuli. Recording ERPs from the central lead does not allow to determine in this case the source of their origin. However, a comparison of ERP of incongruent stimuli from the right and left indicates differences in response to stimuli from different halves of the screen. The appearance of these components for incongruent stimuli exposed on the right side of the screen probably means their association with the functions of the left hemisphere, and confirms the previous hypothesis of metacontrol by the left hemisphere in this type of cognitive task.

P300 Event-Related Potentials in Stutterers and Nonstutterers

1997 ◽  
Vol 40 (6) ◽  
pp. 1334-1340 ◽  
Author(s):  
Michael D. Morgan ◽  
Jerry L. Cranford ◽  
Kenneth Burk
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Related Potentials ◽  
The Right ◽  
Tonal Stimuli ◽  
P300 Event Related Potential

This study investigated possible differences between adult stutterers and nonstutterers in the P300 event-related potential. Responses to tonal stimuli were recorded from electrodes placed over the left (C3) and right (C4) hemispheres. The two groups exhibited different patterns of interhemispheric activity. Although all 8 participants in the fluent group exhibited P300s that were higher in amplitude over the right hemisphere, 5 of the 8 disfluent participants had higher amplitude activity over the left hemisphere. These results provide evidence that stutterers and nonstutterers may exhibit differences between hemispheres in the processing of some types of nonlinguistic (tonal) stimuli.

Late Positive Event-Related Potentials after Commissural Section in Humans

1990 ◽  
Vol 2 (3) ◽  
pp. 258-271 ◽  
Author(s):  
Marta Kutas ◽  
Steven A. Hillyard ◽  
Bruce T. Volpe ◽  
Michael S. Gazzaniga
Keyword(s):  
Corpus Callosum ◽  
Left Hemisphere ◽  
Visual Fields ◽  
Event Related Potentials ◽  
Auditory Oddball ◽  
Oddball Task ◽  
Related Potentials ◽  
The Individual ◽  
The Right ◽  
Auditory Oddball Task

The lateral distribution of the P300 component of the event-related brain potential (ERP) was studied in five epileptic patients whose corpus callosum had been surgically sectioned and in seven neurologically intact controls. The P300 was elicited in an auditory “oddball” task using high- and low-pitched tones and in a visual oddball task in which target words were presented either to the left or right visual fields, or to both fields simultaneously. Commissurotomy altered the normal pattern of bilaterally symmetrical P300 waves over the left and right hemispheres, but in a different manner for auditory and visual stimuli. The auditory P3 to binaural tones was larger in amplitude over the right than the left hemisphere for the patients. In the visual task, the laterality of the P300 varied with the visual field of the target presentation. Left field targets elicited much larger P300 amplitudes over the right than the left hemisphere, as did bilateral targets. In contrast, right field targets triggered P300 waves of about the same amplitude over the two hemispheres. The overall amplitude of the P300 to simultaneous bilateral targets was less than the sum of the individual P300 amplitudes produced in response to the unilateral right and left field targets. These shifts in P300 laterality argue against the view that the P300 is an index of diffuse arousal or activation that is triggered in both hemispheres simultaneously irrespective of which hemisphere processes the target information. The results further demonstrate that the P300 does not depend for its production on interhemispheric comparisons of information mediated by the corpus callosum, as suggested recently by Knight et al. (1989).

Covert Auditory Attention Generates Activation in the Rostral/Dorsal Anterior Cingulate Cortex

2002 ◽  
Vol 14 (4) ◽  
pp. 637-645 ◽  
Author(s):  
Ralph H. B. Benedict ◽  
David W. Shucard ◽  
Michael P. Santa Maria ◽  
Janet L. Shucard ◽  
Jose P. Abara ◽  
...  
Keyword(s):  
Anterior Cingulate Cortex ◽  
Event Related Potentials ◽  
Cingulate Cortex ◽  
Auditory Attention ◽  
Anterior Cingulate ◽  
Covert Attention ◽  
Significant Activity ◽  
Dorsal Anterior Cingulate Cortex ◽  
Related Potentials ◽  
The Right

The anterior cingulate cortex (ACC) is believed to mediate conscious information processing or high-capacity attention. However, previous functional imaging studies have largely relied on tasks that involve motor function as well as attention. The work from our group utilizing an auditory continuous performance task demonstrated increased activity in a caudal division of the ACC that borders the supplementary motor area (SMA). Activity in this region was attributed to motor responding as well as attention. In the present study, we used15O H2O positron emission tomography (PET) to map brain activation during nonmotor, covert auditory attention. Our hypothesis was that a different region within the ACC, anterior to the SMA, would be active during covert attention (CA). Six men and six women were asked to monitor aurally presented syllables presented at a 1-sec interstimulus interval. During the CA condition, subjects were asked to continuously discriminate target (.19 probability) from nontarget stimuli. Simultaneous recording of event-related potentials (ERPs) confirmed the discrimination of target and nontarget stimuli and the allocation of attention capacity. Comparison of the monitored versus nonmonitored presentation of stimuli demonstrated significant activity in a rostral/dorsal division of the right ACC, anterior to SMA. Other regions of activation included the lateral prefrontal cortex and posterior superior temporal gyrus in the left hemisphere, consistent with neurocognitive models of language and vigilance. We conclude that a rostral/dorsal subdivision of the right ACC is specific for conscious attention during auditory processing, in contrast to premotor response formation.

scholarly journals Preattentive detection of auditory memory representations in accumulative drinker

2020 ◽  
Vol 11 (1) ◽  
pp. 85-89
Author(s):  
Phakkharawat Sittiprapaporn
Keyword(s):  
Left Hemisphere ◽  
Right Hemisphere ◽  
Standard Stimulus ◽  
Event Related Potentials ◽  
Auditory Memory ◽  
Middle Temporal Gyrus ◽  
Monosyllabic Words ◽  
Related Potentials ◽  
The Right ◽  
Language Universal

Background: Chinese and English listeners did not show the same left-hemisphere (LH) lateralization as Thai listeners when making perceptual judgments of Thai tones. Although the left hemisphere is selectively employed for processing linguistic information irrespectively of acoustic cues or subtype of phonological unit, the right-hemisphere (RH) is employed for prosody-specific cues. Aims and Objective: As both hemispheres are lateralized for speech and language, the objective of this study is to extend the investigation of how the pre-attentive processing of contour tone changes of Thai monosyllabic words in alcoholic drinkers. Materials and Methods: Forty healthy right-handed adults participated in this study. Results: This study found that both rising-to-falling and falling-to-rising tone changes perception elicited Mismatch Negativity (MMN) between 217-264 msec with reference to the standard-stimulus Event-Related Potentials (ERPs). The rising-to-falling and falling-to-rising tone changes elicited a strong MMN for both groups. Source localization was obtained in the Middle Temporal Gyrus (MTG) of the right hemisphere (RH) for both groups. Conclusion: Automatic detection of changes in contour tones is a useful index of language universal auditory memory traces.

Neuroelectric Correlates of Hemispheric Asymmetry: Spectral Discrimination and Stimulus Competition

2003 ◽  
Vol 14 (08) ◽  
pp. 434-443
Author(s):  
Ralf R. Greenwald ◽  
James Jerger
Keyword(s):  
Auditory Processing ◽  
Hemispheric Asymmetry ◽  
Right Hemisphere ◽  
Cognitive Task ◽  
Hemispheric Specialization ◽  
Event Related Potentials ◽  
Task Demands ◽  
Significant Difference ◽  
Related Potentials ◽  
The Right

In an effort to explore further the role of the right hemisphere in auditory processing, this study utilized brain event-related potentials (ERPs) to investigate hemispheric asymmetry for the processing of complex spectral tones. Subjects participated in two pitch discrimination tasks, one diotic, the other dichotic. ERP components were recorded from 28 electrodes on the scalp and analyzed via individual/group average area measurements. Results showed that ERPs recorded in response to the dichotic target pairs exhibited a larger P3 area when the target tone was presented to the left ear, while the N1 area showed no significant difference. ERPs recorded in the diotic condition showed a larger P3 area and smaller N1 area compared to the dichotic conditions. Finally, all experimental tasks showed that topographic hemispheric activation patterns were asymmetric to the right hemisphere. Findings support the notion that ERP topographic asymmetries may be dependent on specific cognitive task demands (e.g., diotic vs. dichotic modes of presentation). In addition, the data suggest that the P3 component may better reflect interaural advantages for complex tones than the N1 component and may, therefore, be a more sensitive indicator of hemispheric specialization.

scholarly journals Event-related potentials during contralateral switching over motor programs in humans

2020 ◽  
Vol 11 (1) ◽  
pp. 110-115
Author(s):  
O. V. Korzhyk ◽  
O. R. Dmutrotsa ◽  
A. I. Poruchynskyi ◽  
A. H. Morenko
Keyword(s):  
Left Hemisphere ◽  
Motor Response ◽  
Event Related Potentials ◽  
Motor Programs ◽  
Men And Women ◽  
Motor Responses ◽  
Parietal Lobes ◽  
Related Potentials ◽  
Visual Motor ◽  
The Right

The study of processes related to the motor response suppression and the evaluation of the next, alternative, response after termination of the already observed initial motor response is of significant interest to modern scientists. The objective of our research is to identify the gender-specific features of the amplitude-time characteristics of induced cortical electrical activity in the process of the excitation of the motor programs of manual movement. Healthy and right-handed men and women aged 18–23 participated in the research. The research tasks investigated the time of simple and complex visual-motor responses, amplitude-temporal features of N2 and P3 components of cognitive evoked potentials in the response to launch and contralateral switching (dominant or subdominant arm) of the motor program of finger flexes (pressing the remote control button) in the Stop-Change paradigm. Event-related potentials (ERPs) were analyzed in the frontal, central, and parietal lobes of the cortex. It was established that male participants had lower time indexes of simple and complex visual-motor responses than women. In addition, during the contralateral switching of motor programs of manual movements the smaller latent periods of the ERPs components in the right central and left frontal sections (component N2), in the left hemisphere lobes (component P3) among men were observed. The amplitudes of the N2 and P3 components revealed higher values in male participants at the parietal lobes. Thus, the process of recognizing and differentiating the stimulus among men was faster, with more powerful focus and attention on the operative memory. In the left hemisphere of men and women the smaller latent periods of P3component (in the central lobe) and amplitudes of N2 and P3 components were determined compared to the right hemisphere. Thus, the motor programs switching in the paradigm of the experiment occurred with the sequential activation of the left and contralateral right hemispheres.

Behavioral and Electrophysiological Evidence of a Right Hemisphere Bias for the Influence of Negative Emotion on Higher Cognition

2005 ◽  
Vol 17 (3) ◽  
pp. 518-529 ◽  
Author(s):  
Emiliana R. Simon-Thomas ◽  
Kemi O. Role ◽  
Robert T. Knight
Keyword(s):  
Right Hemisphere ◽  
Negative Emotion ◽  
Cognitive Task ◽  
Emotional Responses ◽  
Event Related Potentials ◽  
Visual Hemifield ◽  
Cognitive Task Performance ◽  
Stroop Stimulus ◽  
Related Potentials ◽  
The Right

We examined how responses to aversive pictures affected performance and stimulus-locked event-related potentials (ERPs) recorded during a demanding cognitive task. Numeric Stroop stimuli were briefly presented to either left or right visual hemifield (LVF and RVF, respectively) after a centrally presented aversive or neutral picture from the International Affective Picture System. Subjects indicated whether a quantity value from each Stroop stimulus matched the preceding Stroop stimulus while passively viewing the pictures. After aversive pictures, responses were more accurate for LVF Stroops and less accurate for RVF Stroops. Early-latency extrastriate attention-dependent visual ERPs were enhanced for LVF Stroops. The N2 ERP was enhanced for LVF Stroops over the right frontal and parietal scalp sites. Slow potentials (300–800 msec) recorded over the frontal and parietal regions showed enhanced picture related modulation and amplitude for LVF Stroops. These results suggest that emotional responses to aversive pictures selectively facilitated right hemisphere processing during higher cognitive task performance.

Central Nervous System Processing of Emotions in Children with Fecal Incontinence and Constipation

2019 ◽  
Vol 47 (1) ◽  
pp. 67-71
Author(s):  
Monika Equit ◽  
Justine Niemczyk ◽  
Anna Kluth ◽  
Carla Thomas ◽  
Mathias Rubly ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Fecal Incontinence ◽  
Event Related Potentials ◽  
Anterior Cingulate ◽  
Afferent Pathways ◽  
Study Results ◽  
Related Potentials ◽  
The Central Nervous System ◽  
Cortical Regions

Abstract. Objective: Fecal incontinence and constipation are common disorders in childhood. The enteric nervous system and the central nervous system are highly interactive along the brain-gut axis. The interaction is mainly afferent. These afferent pathways include centers that are involved in the central nervous processing of emotions as the mid/posterior insula and the anterior cingulate cortex. A previous study revealed altered processing of emotions in children with fecal incontinence. The present study replicates these results. Methods: In order to analyze the processing of emotions, we compared the event-related potentials of 25 children with fecal incontinence and constipation to those of 15 control children during the presentation of positive, negative, and neutral pictures. Results: Children with fecal incontinence and constipation showed altered processing of emotions, especially in the parietal and central cortical regions. Conclusions: The main study results of the previous study were replicated, increasing the certainty and validity of the findings.

scholarly journals Reduced Visual Magnocellular Event-Related Potentials in Developmental Dyslexia

2021 ◽  
Vol 11 (1) ◽  
pp. 48
Author(s):  
John Stein
Keyword(s):  
Steady State ◽  
Developmental Dyslexia ◽  
Reading Ability ◽  
Event Related Potentials ◽  
Black And White ◽  
Reverse Pattern ◽  
Related Potentials ◽  
The Right ◽  
Visual Hemifields ◽  
Electroencephalogram Eeg

(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. (2) Methods—in adult dyslexics and normally reading controls, we recorded steady state VERPs, and their frequency content was computed using the fast Fourier transform. The visual stimulus was a black and white checker board whose checks reversed contrast every 100 ms. M- cells respond to this stimulus mainly at 10 Hz, whereas parvocells (P-) do so at 5 Hz. Left and right visual hemifields were stimulated separately in some subjects to see if there were latency differences between the M- inputs to the right vs. left hemispheres, and these were compared with the subjects’ handedness. (3) Results—Controls demonstrated a larger 10 Hz than 5 Hz fundamental peak in the spectra, whereas the dyslexics showed the reverse pattern. The ratio of subjects’ 10/5 Hz amplitudes predicted their reading ability. The latency of the 10 Hz peak was shorter during left than during right hemifield stimulation, and shorter in controls than in dyslexics. The latter correlated weakly with their handedness. (4) Conclusion—Steady state visual ERPs may conveniently be used to identify developmental dyslexia. However, due to the limited numbers of subjects in each sub-study, these results need confirmation.

Asymmetry in Event-Related Potentials to Simulated Auditory Motion in Children, Young Adults, and Seniors

2002 ◽  
Vol 13 (01) ◽  
pp. 001-013 ◽  
Author(s):  
James Jerger ◽  
Rebecca Estes
Keyword(s):  
Young Adults ◽  
Right Hemisphere ◽  
Apparent Movement ◽  
Event Related Potentials ◽  
Auditory Evoked Responses ◽  
Age Related ◽  
Related Potentials ◽  
Velocity Information ◽  
The Right ◽  
Age Range

We studied auditory evoked responses to the apparent movement of a burst of noise in the horizontal plane. Event-related potentials (ERPs) were measured in three groups of participants: children in the age range from 9 to 12 years, young adults in the age range from 18 to 34 years, and seniors in the age range from 65 to 80 years. The topographic distribution of grand-averaged ERP activity was substantially greater over the right hemisphere in children and seniors but slightly greater over the left hemisphere in young adults. This finding may be related to age-related differences in the extent to which judgments of sound movement are based on displacement versus velocity information.

Sign in / Sign up

Export Citation Format

Share Document