scholarly journals Nested oscillations and brain connectivity during sequential stages of feature-based attention

2020 ◽  
Author(s):  
Mattia F. Pagnotta ◽  
David Pascucci ◽  
Gijs Plomp
Keyword(s):  
Selective Attention ◽  
Brain Connectivity ◽  
Spatial Scales ◽  
Visual Selective Attention ◽  
Source Analysis ◽  
Network Efficiency ◽  
Eeg Source Analysis ◽  
Feature Based ◽  
Eeg Recordings ◽  
Oscillatory Rhythms

AbstractBrain mechanisms of visual selective attention involve both local and network-level activity changes at specific oscillatory rhythms, but their interplay remains poorly explored. Here, we investigate anticipatory and reactive effects of feature-based attention using separate fMRI and EEG recordings, while participants attended to one of two spatially overlapping visual features (motion and orientation). We focused on EEG source analysis of local nested oscillations and on graph analysis of connectivity changes in a network of fMRI-defined regions of interest, and characterized a cascade of attentional effects and their interplay at multiple spatial scales. We discuss how the results may reconcile several theories of selective attention, by showing how β rhythms support anticipatory information routing through increased network efficiency and β-γ coupling in functionally specialized regions (V1 for orientation, V5 for motion), while reactive α-band desynchronization patterns and increased α-γ coupling in V1 and V5 mediate stimulus-evoked processing of task-relevant signals.

scholarly journals Flanker task-elicited Event Related Potential sources reflect human recombinant Erythropoietin differential effects on Parkinson’s patients

2019 ◽  
Author(s):  
Maria L Bringas Vega ◽  
Shengnan Liu ◽  
Min Zhang ◽  
Ivonne Pedroso Ibañez ◽  
Lilia M. Morales Chacon ◽  
...  
Keyword(s):  
Flanker Task ◽  
Reaction Times ◽  
Event Related Potential ◽  
Source Analysis ◽  
Random Allocation ◽  
Recombinant Erythropoietin ◽  
Human Recombinant Erythropoietin ◽  
Human Erythropoietin ◽  
Eeg Source Analysis ◽  
Eeg Recordings

AbstractWe used EEG source analysis to identify which cortical areas were involved in the automatic and controlled processes of inhibitory control on a flanker task and compared the potential efficacy of recombinant-human erythropoietin (rHuEPO) on the performance of Parkinson’ s Disease patients.The samples were 18 medicated PD patients (nine of them received rHuEPO in addition to their usual anti-PD medication through random allocation and the other nine patients were on their regular anti-PD medication only) and 9 age and education-matched healthy controls (HCs) who completed the flanker task with simultaneous EEG recordings. N1 and N2 event-related potential (ERP) components were identified and a low-resolution tomography (LORETA) inverse solution was employed to localize the neural generators.Reaction times and errors were increased for the incongruent flankers for PD patients compared to controls. EEG source analysis identified an effect of rHuEPO on the lingual gyri for the early N1 component. N2-related sources in middle cingulate and precuneus were associated with the inhibition of automatic responses evoked by incongruent stimuli differentiated PD and HCs.From our results rHuEPO, seems to mediate an effect on N1 sources in lingual gyri but not on behavioural performance. N2-related sources in middle cingulate and precuneus evoked by incongruent stimuli differentiated PD and HCs.

scholarly journals Flanker Task-Elicited Event-Related Potential Sources Reflect Human Recombinant Erythropoietin Differential Effects on Parkinson’s Patients

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Maria L. Bringas Vega ◽  
Shengnan Liu ◽  
Min Zhang ◽  
Ivonne Pedroso Ibañez ◽  
Lilia M. Morales Chacon ◽  
...  
Keyword(s):  
Flanker Task ◽  
Reaction Times ◽  
Event Related Potential ◽  
Source Analysis ◽  
Random Allocation ◽  
Recombinant Erythropoietin ◽  
Human Recombinant Erythropoietin ◽  
Human Erythropoietin ◽  
Eeg Source Analysis ◽  
Eeg Recordings

We used EEG source analysis to identify which cortical areas were involved in the automatic and controlled processes of inhibitory control on a flanker task and compared the potential efficacy of recombinant-human erythropoietin (rHuEPO) on the performance of Parkinson’s Disease patients. The samples were 18 medicated PD patients (nine of them received rHuEPO in addition to their usual anti-PD medication through random allocation and the other nine patients were on their regular anti-PD medication only) and 9 age and education-matched healthy controls (HCs) who completed the flanker task with simultaneous EEG recordings. N1 and N2 event-related potential (ERP) components were identified and a low resolution tomography (LORETA) inverse solution was employed to localize the neural generators. Reaction times and errors were increased for the incongruent flankers for PD patients compared to controls. EEG source analysis identified an effect of rHuEPO on the lingual gyri for the early N1 component. N2-related sources in middle cingulate and precuneus were associated with the inhibition of automatic responses evoked by incongruent stimuli differentiated PD and HCs. From our results rHuEPO seems to mediate an effect on N1 sources in lingual gyri but not on behavioural performance. N2-related sources in middle cingulate and precuneus were evoked by incongruent stimuli differentiated PD and HCs.

Brain region white matter associations with visual selective attention

2011 ◽  
Vol 5 (4) ◽  
pp. 262-273
Author(s):  
Christie Burger Seiler ◽  
Kelly E. Jones ◽  
David Shera ◽  
Carol L. Armstrong
Keyword(s):  
White Matter ◽  
Selective Attention ◽  
Brain Region ◽  
Visual Selective Attention
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