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

Microsaccades transiently lateralise EEG alpha activity DOI Creative Commons
Baiwei Liu, Anna C. Nobre, Freek van Ede

et al.

Progress in Neurobiology, Journal Year: 2023, Volume and Issue: 224, P. 102433 - 102433

Published: March 11, 2023

The lateralisation of 8-12 Hz alpha activity is a canonical signature human spatial cognition that typically studied under strict fixation requirements. Yet, even during attempted fixation, the brain produces small involuntary eye movements known as microsaccades. Here we report how spontaneous microsaccades - made in absence incentives to look elsewhere can themselves drive transient EEG power according microsaccade direction. This posterior occurs similarly following start and return is, at least for microsaccades, driven by increased ipsilateral reveals new links between electrophysiological activity. It highlights are an important factor consider studies relating including fluctuations cognition, such on visual attention, anticipation, working memory.

Language: Английский

Citations

19
Microsaccades transiently lateralise EEG alpha activity DOI Creative Commons
Baiwei Liu, Anna C. Nobre, Freek van Ede

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2022, Volume and Issue: unknown

Published: Sept. 5, 2022

ABSTRACT The lateralisation of 8-12 Hz alpha activity is a canonical signature human spatial cognition that typically studied under strict fixation requirements. Yet, even during attempted fixation, the brain produces small involuntary eye movements known as microsaccades. Here we report how spontaneous microsaccades – made in absence incentives to look elsewhere can themselves drive transient EEG power according microsaccade direction. This posterior occurs similarly following start and return driven by increased ipsilateral reveals new links between electrophysiological activity, highlights are an important factor consider studies relating cognition.

Language: Английский

Citations

10
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