Visual Processing by Hierarchical and Dynamic Multiplexing DOI Creative Commons
Mathilde Bonnefond, Ole Jensen, Tommy Clausner

et al.

eNeuro, Journal Year: 2024, Volume and Issue: 11(11), P. ENEURO.0282 - 24.2024

Published: Nov. 1, 2024

The complexity of natural environments requires highly flexible mechanisms for adaptive processing single and multiple stimuli. Neuronal oscillations could be an ideal candidate implementing such flexibility in neural systems. Here, we present a framework structuring attention-guided complex visual scenes humans, based on multiplexing phase coding schemes. Importantly, suggest that the dynamic fluctuations excitability vary rapidly terms magnitude, frequency wave-form over time, i.e., they are not necessarily sinusoidal or sustained oscillations. Different elements objects would processed within cycle (burst) alpha activity (7–14 Hz), allowing formation coherent object representations while separating across cycles. Each element separately time—expressed as different gamma band bursts (>30 Hz)—along phase. Since capacity per is limited, inverse relationship between resolution size attentional spotlight ensures independence proposed mechanism from absolute complexity. Frequency wave-shape those depend nature cognitive demands. Multiple further organized along slower (e.g., theta), potentially driven by saccades. Complex scene processing, involving covert attention eye movements, therefore associated with changes lower range. This embraces idea hierarchical organization independent environmental temporal dynamics.

Language: Английский

The relationship between alpha power and heart rate variability commonly seen in various mental states DOI Creative Commons
Tomoya Kawashima, Honoka Shiratori, Kaoru Amano

et al.

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(3), P. e0298961 - e0298961

Published: March 1, 2024

The extensive exploration of the correlation between electroencephalogram (EEG) and heart rate variability (HRV) has yielded inconsistent outcomes, largely attributable to variations in tasks employed studies. direct relationship EEG HRV is further complicated by alpha power, which susceptible influences such as mental fatigue sleepiness. This research endeavors examine brain-heart interplay typically observed during periods music listening rest. In an effort mitigate indirect effects states on subjective sleepiness were measured rest, while emotional valence arousal evaluated listening. Partial analyses unveiled positive associations occipital alpha2 power (10–12 Hz) nHF, indicator parasympathetic activity, under both rest conditions. These findings underscore interactions that persist even after other variables have been accounted for.

Language: Английский

Citations

5
Electroencephalographic Biomarkers of Relaxation: A Systematic Review and Meta-analysis DOI Open Access
Kairi Sugimoto, Hideaki Kurashiki, Yuting Xu

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 28, 2024

Abstract The human electroencephalogram (EEG) is composed of synchronous oscillations within characteristic frequency bands, including 8–13 Hz alpha that often appear during relaxation. Relaxation critical for physical and mental health, but the extent to which various EEG components reflect relaxation remains uncertain. This systematic review meta-analysis investigated associations between concurrently measured reference indices in healthy adults. A comprehensive database search screening using preset criteria identified 38 studies involving 1,120 participants published January 1940 2022 qualitative synthesis. These used measures such as electrocardiographic related parasympathetic nervous system activity introspective obtained through questionnaires. Risks bias were evaluated following risk assessment tool nonrandomized studies. 23 a random-effects model revealed positive correlations index power at central channels (Fisher’s z -transformed correlation coefficient [95% confidence interval]: 0.23 [0.10–0.36]) frontal (0.16 [0.02–0.31]). was significantly higher channel compared with other channels. No significant detected frequencies or causal relationships warrant further study.

Language: Английский

Citations

3
Alpha-band Brain Dynamics and Temporal Processing: An Introduction to the Special Focus DOI
Jason Samaha, Vincenzo Romei

Journal of Cognitive Neuroscience, Journal Year: 2024, Volume and Issue: 36(4), P. 567 - 571

Published: Jan. 1, 2024

Abstract For decades, the intriguing connection between human alpha rhythm (an 8- to 13-Hz oscillation maximal over posterior cortex) and temporal processes in perception has furnished a rich landscape of proposals. The past decade, however, seen surge interest topic, bringing new theoretical, analytic, methodological developments alongside fresh controversies. This Special Focus on alpha-band dynamics processing provides an up-to-date snapshot playing field, with contributions from leading researchers field spanning original perspectives, evidence, comprehensive reviews meta-analyses, as well discussion ongoing controversies paths forward. We hope that perspectives captured here will help catalyze future research shape pathways toward theoretically grounded mechanistic account link properties perception.

Language: Английский

Citations

2
The Influence of Alpha Frequency on Temporal Binding across the Senses: Response to the Special Focus DOI
Uta Noppeney, U.G. Pesci, Jan‐Mathijs Schoffelen

et al.

Journal of Cognitive Neuroscience, Journal Year: 2024, Volume and Issue: 36(4), P. 730 - 733

Published: Jan. 1, 2024

Abstract The papers collected in this Special Focus, prompted by S. Buergers and U. Noppeney [The role of alpha oscillations temporal binding within across the senses. Nature Human Behaviour, 6, 732–742, 2022], have raised several interesting ideas, arguments, empirical results relating to resolution hypothesis. Here we briefly respond these, process emphasize four challenges for future research: defining scope limitation hypothesis; developing experimental paradigms study designs that rigorously test its tenets; decomposing scalp-level signal isolating underlying neural circuits; bringing uniformity current diversity analysis statistical methods. Addressing these will facilitate progression from merely correlating frequency with various perceptual phenomena establishing whether (if so) how influences sensory integration segregation.

Language: Английский

Citations

1
Visual processing by hierarchical and dynamic multiplexing DOI Open Access
Mathilde Bonnefond, Ole Jensen, Tommy Clausner

et al.

Published: Nov. 24, 2023

The complexity of natural environments requires highly flexible mechanisms for adaptive processing. Furthermore, the processing single and multiple stimuli is strongly context goal dependent. large repertoire frequencies waveforms what commonly referred to as neuronal oscillations could be an ideal candidate implementing such flexibility in neural systems. Here we present a framework which dynamic multiplexing phase coding schemes underlie structure attention-guided complex visual scenes. Importantly, suggest that fluctuations excitability vary rapidly terms magnitude, frequency wave-form over time, i.e. they are not necessarily sustained oscillations. We propose different elements object should processed within cycle (or burst) alpha band activity (7-14Hz). This allows formation coherent representations while simultaneously separating objects across cycles. Each element (e.g. eyes or ears cat) would still separately time - expressed gamma bursts (> 30Hz) along phase. Since capacity per limited, inverse relationship between resolution size attentional spotlight ensures independence proposed mechanism from absolute complexity. specific wave-shape respective involved depend on nature cognitive demands. Additionally, further organized slower delta theta). Alternatively, saccades drive reset this slow fluctuations. Complex scene exploration, involving covert attention eye movements, therefore associated with changes, both lower range. embraces idea hierarchical organization processing, independent temporal dynamics environment.

Language: Английский

Citations

2
Visual Processing by Hierarchical and Dynamic Multiplexing DOI Creative Commons
Mathilde Bonnefond, Ole Jensen, Tommy Clausner

et al.

eNeuro, Journal Year: 2024, Volume and Issue: 11(11), P. ENEURO.0282 - 24.2024

Published: Nov. 1, 2024

The complexity of natural environments requires highly flexible mechanisms for adaptive processing single and multiple stimuli. Neuronal oscillations could be an ideal candidate implementing such flexibility in neural systems. Here, we present a framework structuring attention-guided complex visual scenes humans, based on multiplexing phase coding schemes. Importantly, suggest that the dynamic fluctuations excitability vary rapidly terms magnitude, frequency wave-form over time, i.e., they are not necessarily sinusoidal or sustained oscillations. Different elements objects would processed within cycle (burst) alpha activity (7–14 Hz), allowing formation coherent object representations while separating across cycles. Each element separately time—expressed as different gamma band bursts (>30 Hz)—along phase. Since capacity per is limited, inverse relationship between resolution size attentional spotlight ensures independence proposed mechanism from absolute complexity. Frequency wave-shape those depend nature cognitive demands. Multiple further organized along slower (e.g., theta), potentially driven by saccades. Complex scene processing, involving covert attention eye movements, therefore associated with changes lower range. This embraces idea hierarchical organization independent environmental temporal dynamics.

Language: Английский

Citations

0