scholarly journals Illusory and Real Contour Processing: Findings from a Joint Event-related Potential – Functional MRI Analysis

2016 ◽  
Vol 16 (12) ◽  
pp. 135
Author(s):  
Jonathan Wynn ◽  
Amy Jimenez ◽  
William Horan ◽  
Junghee Lee ◽  
Gabrielle Pascual ◽  
...  
Keyword(s):  
Functional Mri ◽  
Event Related Potential ◽  
Real Contour ◽  
Joint Event

scholarly journals Impaired target detection in schizophrenia and the ventral attentional network: Findings from a joint event-related potential–functional MRI analysis

2015 ◽  
Vol 9 ◽  
pp. 95-102 ◽  
Author(s):  
Jonathan K. Wynn ◽  
Amy M. Jimenez ◽  
Brian J. Roach ◽  
Alexander Korb ◽  
Junghee Lee ◽  
...  
Keyword(s):  
Functional Mri ◽  
Target Detection ◽  
Event Related Potential ◽  
Attentional Network ◽  
Joint Event

Functional MRI/Event-related potential study of sensory consonance and dissonance in musicians and nonmusicians

Neuroreport ◽  
2009 ◽  
Vol 20 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Ludovico Minati ◽  
Cristina Rosazza ◽  
Ludovico DʼIncerti ◽  
Emanuela Pietrocini ◽  
Laura Valentini ◽  
...  
Keyword(s):  
Functional Mri ◽  
Event Related Potential ◽  
Potential Study ◽  
Sensory Consonance ◽  
Consonance And Dissonance

Infrequent Events Transiently Activate Human Prefrontal and Parietal Cortex as Measured by Functional MRI

1997 ◽  
Vol 77 (3) ◽  
pp. 1630-1634 ◽  
Author(s):  
Gregory McCarthy ◽  
Marie Luby ◽  
John Gore ◽  
Patricia Goldman-Rakic
Keyword(s):  
Working Memory ◽  
Functional Mri ◽  
Parietal Cortex ◽  
Parietal Lobe ◽  
Neural System ◽  
Blood Oxygenation ◽  
Event Related Potential ◽  
Transient Event ◽  
Inferior Aspect ◽  
Oxygenation Level

McCarthy, Gregory, Marie Luby, John Gore, and Patricia Goldman-Rakic. Infrequent events transiently activate human prefrontal and parietal cortex as measured by functional MRI. J. Neurophysiol. 77: 1630–1634, 1997. P300 is an event-related potential elicited by infrequent target events whose amplitude is dependent on the context provided by the immediately preceding sequence of stimuli, suggesting its dependence on working memory. We employed magnetic resonance imaging sequences sensitive to blood oxygenation level to identify regional changes evoked by infrequent visual target stimuli presented in a task typically used to elicit P300. Targets evoked transient event-related activation bilaterally in the middle frontal gyrus, in the inferior parietal lobe, and near the inferior aspect of the posterior cingulate gyrus beginning within 1.5 s of target onset and peaking between 4.5 and 6 s. These regions have been identified in previous neuroimaging studies in humans, and in single-unit recordings in monkeys, as components of a neural system mediating working memory, which suggests that this system may be activated by the same events that evoke P300.

scholarly journals A multifunctional method (ERP and fMRI) of analysis on facial expression. Three pilot studies

2007 ◽  
Author(s):  
Galit Yovel
Keyword(s):  
Functional Mri ◽  
Face Processing ◽  
Neural Response ◽  
Event Related Potential ◽  
High Temporal Resolution ◽  
Neural Basis ◽  
The Face ◽  
Related Potentials ◽  
Face Stimuli ◽  
The Relationship

As social primates, one of the most important cognitive tasks we conduct, dozens of times a day, is to look at a face and extract the person's identity. During the last decade, the neural basis of face processing has been extensively investigated in humans with event-related potential (ERP) and functional MRI (fMRI). These two methods provide complementary information about the temporal and spatial aspects of the neural response, with ERPs allowing high temporal resolution of milliseconds but low spatial resolution of the neural generator and fMRI displaying a slow hemodynamic response but better spatial localization of the activated regions. Despite the extensive fMRI and ERP research of faces, only a few studies have assessed the relationship between the two methods and no study to date have collected simultaneous ERP and fMRI responses to face stimuli. In the current paper we will try to assess the spatial and temporal aspects of the neural response to faces by simultaneously collecting functional MRI and event-related potentials (ERP) to face stimuli. Our goals are twofold: 1) ERP and fMRI show a robust selective response to faces. In particular, two well-established face-specific phenomena, the RH superiority and the inversion effect are robustly found with both ERP and fMRI. Despite the extensive research of these effects with ERP and fMRI, it is still unknown to what extent their spatial (fMRI) and temporal (ERP) aspects are associated. In Study 1 we will employ an individual differences approach, to assess the relationship between these ERP and fMRI face-specific responses. 2) Face processing involves several stages starting from structural encoding of the face image through identity processing to storage for later retrieval. This representation undergoes several manipulations that take place at different time points and in different brain regions before the final percept is generated. By simultaneously recording ERP and fMRI we hope to gain a more comprehensive understanding of the timecourse that different brain areas participate in the generation of the face representation.

Sensory and Cognitive Components of Auditory Processing in Individuals With Tinnitus

2019 ◽  
Vol 28 (4) ◽  
pp. 834-842
Author(s):  
Harini Vasudevan ◽  
Hari Prakash Palaniswamy ◽  
Ramaswamy Balakrishnan
Keyword(s):  
Selective Attention ◽  
Auditory Processing ◽  
Function Analysis ◽  
Event Related Potential ◽  
Oscillatory Activity ◽  
Default Mode ◽  
Auditory Selective Attention ◽  
Cognitive Components ◽  
Mode Function ◽  
Related Potentials

Purpose The main purpose of the study is to explore the auditory selective attention abilities (using event-related potentials) and the neuronal oscillatory activity in the default mode network sites (using electroencephalogram [EEG]) in individuals with tinnitus. Method Auditory selective attention was measured using P300, and the resting state EEG was assessed using the default mode function analysis. Ten individuals with continuous and bothersome tinnitus along with 10 age- and gender-matched control participants underwent event-related potential testing and 5 min of EEG recording (at wakeful rest). Results Individuals with tinnitus were observed to have larger N1 and P3 amplitudes along with prolonged P3 latency. The default mode function analysis revealed no significant oscillatory differences between the groups. Conclusion The current study shows changes in both the early sensory and late cognitive components of auditory processing. The change in the P3 component is suggestive of selective auditory attention deficit, and the sensory component (N1) suggests an altered bottom-up processing in individuals with tinnitus.

P300 Amplitude and Topography in an Autobiographical Oddball Paradigm Involving Simulated Amnesia

2002 ◽  
Vol 16 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Antoinette R. Miller ◽  
J. Peter Rosenfeld ◽  
Matthew Soskins ◽  
Marianne Jhee
Keyword(s):  
Task Difficulty ◽  
Event Related Potential ◽  
P300 Amplitude ◽  
Oddball Paradigm ◽  
Amplitude Difference ◽  
P300 Component ◽  
Oddball Task

Abstract The P300 component of the event-related potential was recorded during two blocks of an autobiographical oddball task. All participants performed honestly during the first block (Phone), i.e., the oddball stimuli were phone numbers. During the second block (Birthday), in which the oddball stimuli were participants' birthdays, a Truth group (N = 13) performed honestly and a Malinger group (N = 14) simulated amnesia. Amnesia simulation significantly reduced P300 amplitudes, both between groups and within the Malinger group (Phone vs. Birthday), possibly because of an increase in task difficulty in the Malinger condition. Analysis of scaled amplitudes also indicated a trend for a feigning-related alteration in P300 topography. Bootstrapping of peak-to-peak amplitudes detected significantly more (93%) Malinger individuals than bootstrapping of baseline-to-peak amplitudes (64%). Bootstrapping also provided evidence of a feigning-related amplitude difference between oddball stimuli (i.e., Phone > Birthday) in 71% of Malinger group individuals. In this comparison, the peak-to-peak measure also performed significantly better in intraindividual diagnostics.

Sign in / Sign up

Export Citation Format

Share Document