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Related Experiment Video

Updated: Jun 13, 2025

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
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Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

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Opposing neural processing modes alternate rhythmically during sustained auditory attention.

Florian H Kasten1,2,3, Quentin Busson4, Benedikt Zoefel5,6

  • 1Department for Cognitive, Affective, Behavioral Neuroscience with Focus Neurostimulation, Institute of Psychology, University of Trier, Trier, Germany. florian.kasten@uni-trier.de.

Communications Biology
|September 12, 2024
PubMed
Summary

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This summary is machine-generated.

Human attention naturally fluctuates between processing external stimuli and internal thoughts. This study reveals opposing brain network activities, neural entrainment and alpha oscillations, that underlie these shifts during sustained attention tasks.

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Human performance during continuous tasks exhibits spontaneous fluctuations, potentially due to dynamic shifts in attentional resources.
  • A dichotomy of "internal" versus "external" attention is proposed, where neural resources allocated internally may lead to missed external sensory input.

Purpose of the Study:

  • To investigate the temporal dynamics of neural signatures associated with internal and external attention modes.
  • To determine if these neural modes fluctuate periodically and relate to performance in a sustained attention task.

Main Methods:

  • Utilized electroencephalography (EEG) to record brain activity in humans during a continuous attention task involving auditory stimuli.
  • Extracted neural entrainment (speech processing) and alpha oscillations (~10-Hz, sensory suppression) as markers for external and internal attention, respectively.

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Last Updated: Jun 13, 2025

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  • Analyzed the temporal fluctuations of these neural markers and their correlation with auditory target detection.

    • Main Results:

    • Identified an antagonistic relationship between neural entrainment to speech and alpha oscillations within distinct brain networks.
    • Observed slow, periodic fluctuations (around 0.07 Hz) in these opposing neural modes.
    • Demonstrated that these fluctuations were significantly related to the ability to detect auditory targets.

    Conclusions:

    • The findings suggest a general, conserved attentional mechanism involving opposing neural modes for processing external information and internal states.
    • These periodic fluctuations in attention have critical implications for tasks requiring sustained focus on sensory information.
    • The study provides insights into the neural basis of attention and its impact on performance in demanding cognitive tasks.