Source Localization of Event-Related Potentials Incorporating Spatial Notch Filters

2008 ◽  
Vol 55 (9) ◽  
pp. 2232-2239 ◽  
Author(s):  
Loukianos Spyrou ◽  
Saeid Sanei
Keyword(s):  
Source Localization ◽  
Event Related Potentials ◽  
Notch Filters ◽  
Related Potentials

Source Localization of Subtopographic Brain Maps for Event Related Potentials (ERP)

2008 ◽  
pp. 1247-1252
Author(s):  
Adil Deniz Duru ◽  
Ali Bayram ◽  
Tamer Demiralp ◽  
Ahmet Ademoglu
Keyword(s):  
Source Localization ◽  
Temporal Frequency ◽  
Event Related Potentials ◽  
Functional Brain Imaging ◽  
Frequency Content ◽  
Brain Potentials ◽  
Functional Brain ◽  
Brain Responses ◽  
Related Potentials ◽  
The Brain

Event-related potentials (ERP) are transient brain responses to cognitive stimuli, and they consist of several stationary events whose temporal frequency content can be characterized in terms of oscillations or rhythms. Precise localization of electrical events in the brain, based on the ERP data recorded from the scalp, has been one of the main challenges of functional brain imaging. Several currentDensity estimation techniques for identifying the electrical sources generating the brain potentials are developed for the so-called neuroelectromagnetic inverse problem in the last three decades (Baillet, Mosher, & Leahy, 2001; Koles, 1998; Michela, Murraya, Lantza, Gonzaleza, Spinellib, & Grave de Peraltaa, 2004; Scherg & von Cramon, 1986).

Stability of Source Localization with LORETA of Visual Target Processing

2004 ◽  
Vol 18 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Martin J. Herrmann ◽  
Andreas J. Fallgatter
Keyword(s):  
Source Localization ◽  
Posterior Parietal Cortex ◽  
Performance Test ◽  
Parietal Lobe ◽  
Event Related Potentials ◽  
Continuous Performance Test ◽  
Target Condition ◽  
Global Field Power ◽  
Related Potentials ◽  
Posterior Parietal

Abstract This study investigates whether LORETA, a method of source localization of EEG data, reveals replicable and valid sources of event-related potentials (ERPs), which are supposed to be generated in a widespread cortical network. For that purpose, the ERPs in a rare primer (= target) and a frequent distractor condition (= nontarget) of a visually presented Continuous Performance Test (CPT) were analyzed in two independent samples of healthy subjects (n1 = 49, n2 = 38). At about 420ms significantly higher global field power values (GFP) were observed in the target condition as compared to the nontarget condition. For both samples the LORETA source localization revealed significantly higher activation for the target-condition as compared to the nontarget condition in the anterior cingulum, the precuneus and superior-posterior parietal cortex (parietal lobe), the insula, and the fusiform gyrus (temporal lobe). Only in the second sample were widespread areas in the frontal cortex also activated. The results indicate that LORETA localizes widespread cortical areas involved in target processing similar to results of fMRI studies.

scholarly journals Attentional Processes in Children With Attentional Problems or Reading Difficulties as Revealed Using Brain Event-Related Potentials and Their Source Localization

2020 ◽  
Vol 14 ◽  
Author(s):  
Praghajieeth Raajhen Santhana Gopalan ◽  
Otto Loberg ◽  
Kaisa Lohvansuu ◽  
Bruce McCandliss ◽  
Jarmo Hämäläinen ◽  
...  
Keyword(s):  
Source Localization ◽  
Reading Difficulties ◽  
Event Related Potentials ◽  
Attentional Processes ◽  
Related Potentials
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