Pre‐stimulus alpha‐band power and phase fluctuations originate from different neural sources and exert distinct impact on stimulus‐evoked responses

2021 ◽  
Author(s):  
Agnese Zazio ◽  
Philipp Ruhnau ◽  
Nathan Weisz ◽  
Andreas Wutz
Keyword(s):  
Evoked Responses ◽  
Alpha Band ◽  
Phase Fluctuations ◽  
Band Power

scholarly journals Increased Alpha-Band Power during the Retention of Shapes and Shape-Location Associations in Visual Short-Term Memory

2011 ◽  
Vol 2 ◽  
Author(s):  
Jeffrey S. Johnson ◽  
David W. Sutterer ◽  
Daniel J. Acheson ◽  
Jarrod A. Lewis-Peacock ◽  
Bradley R. Postle
Keyword(s):  
Short Term Memory ◽  
Alpha Band ◽  
Short Term ◽  
Term Memory ◽  
Visual Short Term Memory ◽  
Band Power

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

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.

scholarly journals Intraoperative Frontal Alpha-Band Power Correlates with Preoperative Neurocognitive Function in Older Adults

2017 ◽  
Vol 11 ◽  
Author(s):  
Charles M. Giattino ◽  
Jacob E. Gardner ◽  
Faris M. Sbahi ◽  
Kenneth C. Roberts ◽  
Mary Cooter ◽  
...  
Keyword(s):  
Older Adults ◽  
Neurocognitive Function ◽  
Alpha Band ◽  
Band Power

U-shaped Relation between Prestimulus Alpha-band and Poststimulus Gamma-band Power in Temporal Tactile Perception in the Human Somatosensory Cortex

2018 ◽  
Vol 30 (4) ◽  
pp. 552-564 ◽  
Author(s):  
Marc André Wittenberg ◽  
Thomas J. Baumgarten ◽  
Alfons Schnitzler ◽  
Joachim Lange
Keyword(s):  
Gamma Band ◽  
Gamma Activity ◽  
Left Index Finger ◽  
Behavioral Performance ◽  
Alpha Band ◽  
Band Power ◽  
And Performance ◽  
Electrical Stimuli ◽  
Gamma Band Oscillations ◽  
Human Nervous System

Neuronal oscillations are a ubiquitous phenomenon in the human nervous system. Alpha-band oscillations (8–12 Hz) have been shown to correlate negatively with attention and performance, whereas gamma-band oscillations (40–150 Hz) correlate positively. Here, we studied the relation between prestimulus alpha-band power and poststimulus gamma-band power in a suprathreshold tactile discrimination task. Participants received two electrical stimuli to their left index finger with different SOAs (0 msec, 100 msec, intermediate SOA, intermediate SOA ± 10 msec). The intermediate SOA was individually determined so that stimulation was bistable, and participants perceived one stimulus in half of the trials and two stimuli in the other half. We measured neuronal activity with magnetoencephalography (MEG). In trials with intermediate SOAs, behavioral performance correlated inversely with prestimulus alpha-band power but did not correlate with poststimulus gamma-band power. Poststimulus gamma-band power was high in trials with low and high prestimulus alpha-band power and low for intermediate prestimulus alpha-band power (i.e., U-shaped). We suggest that prestimulus alpha activity modulates poststimulus gamma activity and subsequent perception: (1) low prestimulus alpha-band power leads to high poststimulus gamma-band power, biasing perception such that two stimuli were perceived; (2) intermediate prestimulus alpha-band power leads to low gamma-band power (interpreted as inefficient stimulus processing), consequently, perception was not biased in either direction; and (3) high prestimulus alpha-band power leads to high poststimulus gamma-band power, biasing perception such that only one stimulus was perceived.

Spontaneous Neural Fluctuations Predict Decisions to Attend

2014 ◽  
Vol 26 (11) ◽  
pp. 2578-2584 ◽  
Author(s):  
Jesse J. Bengson ◽  
Todd A. Kelley ◽  
Xiaoke Zhang ◽  
Jane-Ling Wang ◽  
George R. Mangun
Keyword(s):  
Decision Making ◽  
Neural Activity ◽  
Intrinsic Property ◽  
Alternative View ◽  
Alpha Band ◽  
Band Power ◽  
Trial Basis ◽  
Human Participants ◽  
Neural Signaling ◽  
The Brain

Ongoing variability in neural signaling is an intrinsic property of the brain. Often this variability is considered to be noise and ignored. However, an alternative view is that this variability is fundamental to perception and cognition and may be particularly important in decision-making. Here, we show that a momentary measure of occipital alpha-band power (8–13 Hz) predicts choices about where human participants will focus spatial attention on a trial-by-trial basis. This finding provides evidence for a mechanistic account of decision-making by demonstrating that ongoing neural activity biases voluntary decisions about where to attend within a given moment.

scholarly journals Prestimulus alpha-band power biases visual discrimination confidence, but not accuracy

2017 ◽  
Vol 54 ◽  
pp. 47-55 ◽  
Author(s):  
Jason Samaha ◽  
Luca Iemi ◽  
Bradley R. Postle
Keyword(s):  
Visual Discrimination ◽  
Alpha Band ◽  
Band Power

Using theta and alpha band power to assess cognitive workload in multitasking environments

2018 ◽  
Vol 123 ◽  
pp. 111-120 ◽  
Author(s):  
Sébastien Puma ◽  
Nadine Matton ◽  
Pierre-V. Paubel ◽  
Éric Raufaste ◽  
Radouane El-Yagoubi
Keyword(s):  
Cognitive Workload ◽  
Alpha Band ◽  
Band Power

THE RELATION BETWEEN ALPHA BAND POWER, HEART RATE AND FMRI

2007 ◽  
Author(s):  
J.C. De Munck ◽  
S.I. Goncalves ◽  
Th Faes ◽  
P. Pouwels ◽  
J. Kuijer ◽  
...  
Keyword(s):  
Heart Rate ◽  
Alpha Band ◽  
Band Power
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