The First Derivative of the Electroencephalogram Facilitates Tracking of Electroencephalographic Alpha Band Activity During General Anesthesia

AbstractPrediction is a core function of the human visual system. Contemporary research suggests the brain builds predictive internal models of the world to facilitate interactions with our dynamic environment. Here, we wanted to examine the behavioural and neurological consequences of disrupting a core property of peoples’ internal models, using naturalistic stimuli. We had people view videos of basketball and asked them to track the moving ball and predict jump shot outcomes, all while we recorded eye movements and brain activity. To disrupt people’s predictive internal models, we inverted footage on half the trials, so dynamics were inconsistent with how movements should be shaped by gravity. When viewing upright videos people were better at predicting shot outcomes, at tracking the ball position, and they had enhanced alpha-band oscillatory activity in occipital brain regions. The advantage for predicting upright shot outcomes scaled with improvements in ball tracking and occipital alpha-band activity. Occipital alpha-band activity has been linked to selective attention and spatially-mapped inhibitions of visual brain activity. We propose that when people have a more accurate predictive model of the environment, they can more easily parse what is relevant, allowing them to better target irrelevant positions for suppression—resulting in both better predictive performance and in neural markers of inhibited information processing.

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Left temporal alpha band activity increases during working memory retention of pitches

European Journal of Neuroscience ◽

10.1111/j.1460-9568.2010.07227.x ◽

2010 ◽

pp. no-no ◽

Cited By ~ 11

Author(s):

Hanneke Van Dijk ◽

Ingrid L.C. Nieuwenhuis ◽

Ole Jensen

Keyword(s):

Working Memory ◽

Memory Retention ◽

Alpha Band ◽

Band Activity

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Occipitoparietal alpha-band responses to the graded allocation of top-down spatial attention

Journal of Neurophysiology ◽

10.1152/jn.00654.2013 ◽

2014 ◽

Vol 112 (6) ◽

pp. 1307-1316 ◽

Cited By ~ 14

Author(s):

Isabel Dombrowe ◽

Claus C. Hilgetag

Keyword(s):

Visual Field ◽

Spatial Attention ◽

Brain Regions ◽

Alpha Band ◽

Top Down ◽

Attentional Resources ◽

Parietal Lobes ◽

Visual Spatial ◽

Entire Visual Field ◽

Band Activity

The voluntary, top-down allocation of visual spatial attention has been linked to changes in the alpha-band of the electroencephalogram (EEG) signal measured over occipital and parietal lobes. In the present study, we investigated how occipitoparietal alpha-band activity changes when people allocate their attentional resources in a graded fashion across the visual field. We asked participants to either completely shift their attention into one hemifield, to balance their attention equally across the entire visual field, or to attribute more attention to one-half of the visual field than to the other. As expected, we found that alpha-band amplitudes decreased stronger contralaterally than ipsilaterally to the attended side when attention was shifted completely. Alpha-band amplitudes decreased bilaterally when attention was balanced equally across the visual field. However, when participants allocated more attentional resources to one-half of the visual field, this was not reflected in the alpha-band amplitudes, which just decreased bilaterally. We found that the performance of the participants was more strongly reflected in the coherence between frontal and occipitoparietal brain regions. We conclude that low alpha-band amplitudes seem to be necessary for stimulus detection. Furthermore, complete shifts of attention are directly reflected in the lateralization of alpha-band amplitudes. In the present study, a gradual allocation of visual attention across the visual field was only indirectly reflected in the alpha-band activity over occipital and parietal cortexes.

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Exploring the relationship of phase and peak-frequency EEG alpha-band and beta-band activity to temporal judgments of stimulus duration

Cognitive Neuroscience ◽

10.1080/17588928.2017.1359524 ◽

2017 ◽

Vol 8 (4) ◽

pp. 193-205 ◽

Cited By ~ 3

Author(s):

Alex Milton ◽

Christopher Pleydell-Pearce

Keyword(s):

Stimulus Duration ◽

Peak Frequency ◽

Alpha Band ◽

Beta Band ◽

Eeg Alpha ◽

Relationship Of ◽

The Relationship ◽

Temporal Judgments ◽

Band Activity

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Modulation of magnetoencephalography alpha band activity by radiofrequency electromagnetic field depicted in sensor and source space

Scientific Reports ◽

10.1038/s41598-021-02560-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jasmina Wallace ◽

Lydia Yahia-Cherif ◽

Christophe Gitton ◽

Laurent Hugueville ◽

Jean-Didier Lemaréchal ◽

...

Keyword(s):

High Performance ◽

Spectral Power ◽

Heart Rate Variability Analysis ◽

Alpha Band ◽

Control Parameters ◽

Double Blind ◽

Eyes Closed ◽

Significant Difference ◽

Cortical Regions ◽

Band Activity

AbstractSeveral studies reported changes in spontaneous electroencephalogram alpha band activity related to radiofrequency electromagnetic fields, but findings showed both an increase and a decrease of its spectral power or no effect. Here, we studied the alpha band modulation after 900 MHz mobile phone radiofrequency exposure and localized cortical regions involved in these changes, via a magnetoencephalography (MEG) protocol with healthy volunteers in a double-blind, randomized, counterbalanced crossover design. MEG was recorded during eyes open and eyes closed resting-state before and after radiofrequency exposure. Potential confounding factors, known to affect alpha band activity, were assessed as control parameters to limit bias. Entire alpha band, lower and upper alpha sub-bands MEG power spectral densities were estimated in sensor and source space. Biochemistry assays for salivary biomarkers of stress (cortisol, chromogranin-A, alpha amylase), heart rate variability analysis and high-performance liquid chromatography for salivary caffeine concentration were realized. Results in sensor and source space showed a significant modulation of MEG alpha band activity after the radiofrequency exposure, with different involved cortical regions in relation to the eyes condition, probably because of different attention level with open or closed eyes. None of the control parameters reported a statistically significant difference between experimental sessions.

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L-Theanine and Caffeine in Combination Affect Human Cognition as Evidenced by Oscillatory alpha-Band Activity and Attention Task Performance

Journal of Nutrition ◽

10.1093/jn/138.8.1572s ◽

2008 ◽

Vol 138 (8) ◽

pp. 1572S-1577S ◽

Cited By ~ 72

Author(s):

Simon P. Kelly ◽

Manuel Gomez-Ramirez ◽

Jennifer L. Montesi ◽

John J. Foxe

Keyword(s):

Task Performance ◽

Human Cognition ◽

Alpha Band ◽

Attention Task ◽

Band Activity

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Propofol Requirement and EEG Alpha Band Power During General Anesthesia Provide Complementary Views on Preoperative Cognitive Decline

Frontiers in Aging Neuroscience ◽

10.3389/fnagi.2020.593320 ◽

2020 ◽

Vol 12 ◽

Author(s):

Cyril Touchard ◽

Jérôme Cartailler ◽

Charlotte Levé ◽

José Serrano ◽

David Sabbagh ◽

...

Keyword(s):

Cognitive Decline ◽

General Anesthesia ◽

Logistic Models ◽

Alpha Band ◽

Target Concentration ◽

Operative Morbidity ◽

Band Power ◽

Cognitive Evaluation ◽

Eeg Alpha ◽

Better Than

Background: Although cognitive decline (CD) is associated with increased post-operative morbidity and mortality, routinely screening patients remains difficult. The main objective of this prospective study is to use the EEG response to a Propofol-based general anesthesia (GA) to reveal CD.Methods: 42 patients with collected EEG and Propofol target concentration infusion (TCI) during GA had a preoperative cognitive assessment using MoCA. We evaluated the performance of three variables to detect CD (MoCA < 25 points): age, Propofol requirement to induce unconsciousness (TCI at SEF95: 8–13 Hz) and the frontal alpha band power (AP at SEF95: 8–13 Hz).Results: The 17 patients (40%) with CD were significantly older (p < 0.001), had lower TCI (p < 0.001), and AP (p < 0.001). We found using logistic models that TCI and AP were the best set of variables associated with CD (AUC: 0.89) and performed better than age (p < 0.05). Propofol TCI had a greater impact on CD probability compared to AP, although both were complementary in detecting CD.Conclusion: TCI and AP contribute additively to reveal patient with preoperative cognitive decline. Further research on post-operative cognitive trajectory are necessary to confirm the interest of intra operative variables in addition or as a substitute to cognitive evaluation.

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