Visual Spatial Attention in Migraine Sufferers in Postictal and Interictal Phases: An Event-Related Potential Study

2001 ◽  
Vol 15 (1) ◽  
pp. 22-34 ◽  
Author(s):  
D.H. de Koning ◽  
J.C. Woestenburg ◽  
M. Elton
Keyword(s):  
Cerebral Cortex ◽  
Visual Attention ◽  
Migraine Attack ◽  
Spatial Attention ◽  
Event Related Potential ◽  
Significant Enhancement ◽  
Pathophysiological Mechanism ◽  
Attention Task ◽  
Visual Spatial Attention ◽  
Visual Spatial

Migraineurs with and without aura (MWAs and MWOAs) as well as controls were measured twice with an interval of 7 days. The first session of recordings and tests for migraineurs was held about 7 hours after a migraine attack. We hypothesized that electrophysiological changes in the posterior cerebral cortex related to visual spatial attention are influenced by the level of arousal in migraineurs with aura, and that this varies over the course of time. ERPs related to the active visual attention task manifested significant differences between controls and both types of migraine sufferers for the N200, suggesting a common pathophysiological mechanism for migraineurs. Furthermore, migraineurs without aura (MWOAs) showed a significant enhancement for the N200 at the second session, indicating the relevance of time of measurement within migraine studies. Finally, migraineurs with aura (MWAs) showed significantly enhanced P240 and P300 components at central and parietal cortical sites compared to MWOAs and controls, which seemed to be maintained over both sessions and could be indicative of increased noradrenergic activity in MWAs.

Influence of a visual spatial attention task on auditory early and late Nd and P300

2005 ◽  
Vol 68 (2) ◽  
pp. 121-134 ◽  
Author(s):  
Joel Ramirez ◽  
Marie Bomba ◽  
Anthony Singhal ◽  
Barry Fowler
Keyword(s):  
Spatial Attention ◽  
Attention Task ◽  
Visual Spatial Attention ◽  
Visual Spatial

scholarly journals Functionally independent components of early event-related potentials in a visual spatial attention task

1999 ◽  
Vol 354 (1387) ◽  
pp. 1135-1144 ◽  
Author(s):  
Scott Makeig ◽  
Marissa Westerfield ◽  
Jeanne Townsend ◽  
Tzyy-Ping Jung ◽  
Eric Courchesne ◽  
...  
Keyword(s):  
Visual Field ◽  
Spatial Attention ◽  
Visual Target ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Right Visual Field ◽  
Early Event ◽  
Attention Task ◽  
Visual Spatial ◽  
Related Potentials

Spatial visual attention modulates the first negative–going deflection in the human averaged event–related potential (ERP) in response to visual target and non–target stimuli (the N1 complex). Here we demonstrate a decomposition of N1 into functionally independent subcomponents with functionally distinct relations to task and stimulus conditions. ERPs were collected from 20 subjects in response to visual target and non–target stimuli presented at five attended and non–attended screen locations. Independent component analysis, a new method for blind source separation, was trained simultaneously on 500 ms grand average responses from all 25 stimulus–attention conditions and decomposed the non–target N1 complexes into five spatially fixed, temporally independent and physiologically plausible components. Activity of an early, laterally symmetrical component pair (N1a R and N1a L ) was evoked by the left and right visual field stimuli, respectively. Component N1a R peaked ca. 9 ms earlier than N1a L . Central stimuli evoked both components with the same peak latency difference, producing a bilateral scalp distribution. The amplitudes of these components were not reliably augmented by spatial attention. Stimuli in the right visual field evoked activity in a spatio–temporally overlapping bilateral component (N1b) that peaked at ca. 180 ms and was strongly enhanced by attention. Stimuli presented at unattended locations evoked a fourth component (P2a) peaking near 240 ms. A fifth component (P3f) was evoked only by targets presented in either visual field. The distinct response patterns of these components across the array of stimulus and attention conditions suggest that they reflect activity in functionally independent brain systems involved in processing attended and unattended visuospatial events.

scholarly journals Unchanged EEG correlates of covert visual spatial attention after prism adaptation in healthy subjects

2018 ◽  
Author(s):  
Marjolein van der Waal ◽  
Inez Wijnands ◽  
Jason Farquhar
Keyword(s):  
Spatial Attention ◽  
Healthy Subjects ◽  
Prism Adaptation ◽  
Attention Task ◽  
Visual Spatial Attention ◽  
Visual Spatial ◽  
Brain Signals ◽  
Before And After ◽  
Behavioural Performance ◽  
P3 Component

Behavioural effects of prism adaptation in healthy subjects and neglect patients suggest a link between prism adaptation and spatial attention. A recent study found an effect of prism adaptation on several EEG correlates of spatial attention, but for two other correlates (the P3 component of the oddball ERP and alpha lateralization), the relationship remained unclear. In the current experiment, 10 healthy subjects performed a visual spatial attention task which was optimized for eliciting these two brain signals. This task was performed before and after adaptation to prism glasses with a leftward optical deviation. While prism adaptation induced a rightward bias on a pointing task, there was no effect of adaptation on behavioural performance on the spatial attention task. Moreover, the P3 component of the ERP and alpha lateralization were not influenced by prism adaptation. Together, these results show that some EEG correlates of visual spatial attention remain unchanged after prism adaptation, a finding which has its implications for current models of the neurocognitive mechanisms behind prism adaptation.

scholarly journals Functionally Independent Components of the Late Positive Event-Related Potential during Visual Spatial Attention

1999 ◽  
Vol 19 (7) ◽  
pp. 2665-2680 ◽  
Author(s):  
Scott Makeig ◽  
Marissa Westerfield ◽  
Tzyy-Ping Jung ◽  
James Covington ◽  
Jeanne Townsend ◽  
...  
Keyword(s):  
Spatial Attention ◽  
Event Related Potential ◽  
Independent Components ◽  
Visual Spatial Attention ◽  
Visual Spatial

scholarly journals Using Partial Directed Coherence to Study Alpha-Band Effective Brain Networks during a Visuospatial Attention Task

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Zongya Zhao ◽  
Chang Wang
Keyword(s):  
Spatial Attention ◽  
Path Length ◽  
Effective Connectivity ◽  
Brain Networks ◽  
Connectivity Pattern ◽  
Characteristic Path Length ◽  
Attention Task ◽  
Visual Spatial Attention ◽  
Visual Spatial ◽  
Global Efficiency

Previous studies have shown that the neural mechanisms underlying visual spatial attention rely on top-down control information from the frontal and parietal cortexes, which ultimately amplifies sensory processing of stimulus occurred at the attended location relative to those at unattended location. However, the modulations of effective brain networks in response to stimulus at attended and unattended location are not yet clear. In present study, we collected event-related potentials (ERPs) from 15 subjects during a visual spatial attention task, and a partial directed coherence (PDC) method was used to construct alpha-band effective brain networks of two conditions (targets at attended and nontargets at unattended location). Flow gain mapping, effective connectivity pattern, and graph measures including clustering coefficient (C), characteristic path length (L), global efficiency (Eglobal), and local efficiency (Elocal) were compared between two conditions. Flow gain mapping showed that the frontal region seemed to serve as the main source of information transmission in response to targets at attended location while the parietal region served as the main source in nontarget condition. Effective connectivity pattern indicated that in response to targets, there existed obvious top-down connections from the frontal, temporal, and parietal cortexes to the visual cortex compared with in response to nontargets. Graph theory analysis was used to quantify the topographical properties of the brain networks, and results revealed that in response to targets, the brain networks were characterized by significantly smaller characteristic path length and larger global efficiency than in response to nontargets. Our findings suggested that smaller characteristic path length and larger global efficiency could facilitate global integration of information and provide a substrate for more efficient perceptual processing of targets at attended location compared with processing of nontargets at ignored location, which revealed the neural mechanisms underlying visual spatial attention from the perspective of effective brain networks and graph theory for the first time and opened new vistas to interpret a cognitive process.

scholarly journals Exogenous capture of visual spatial attention by olfactory-trigeminal stimuli

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252943
Author(s):  
Matthieu Ischer ◽  
Géraldine Coppin ◽  
Axel De Marles ◽  
Myriam Essellier ◽  
Christelle Porcherot ◽  
...  
Keyword(s):  
Visual Attention ◽  
Spatial Attention ◽  
Attentional Capture ◽  
Reaction Times ◽  
Trigeminal System ◽  
Alert System ◽  
Visual Spatial Attention ◽  
Visual Spatial ◽  
Visual Targets ◽  
The Individual

The extent to which a nasal whiff of scent can exogenously orient visual spatial attention remains poorly understood in humans. In a series of seven studies, we investigated the existence of an exogenous capture of visual spatial attention by purely trigeminal (i.e., CO2) and both olfactory and trigeminal stimuli (i.e., eucalyptol). We chose these stimuli because they activate the trigeminal system which can be considered as an alert system and are thus supposedly relevant for the individual, and thus prone to capture attention. We used them as lateralized cues in a variant of a visual spatial cueing paradigm. In valid trials, trigeminal cues and visual targets were presented on the same side whereas in invalid trials they were presented on opposite sides. To characterize the dynamics of the cross-modal attentional capture, we manipulated the interval between the onset of the trigeminal cues and the visual targets (from 580 to 1870 ms). Reaction times in trigeminal valid trials were shorter than all other trials, but only when this interval was around 680 or 1170 ms for CO2 and around 610 ms for eucalyptol. This result reflects that both pure trigeminal and olfactory-trigeminal stimuli can exogenously capture humans’ spatial visual attention. We discuss the importance of considering the dynamics of this cross-modal attentional capture.

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