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Related Experiment Video

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Quantifying emotion-dependent brain-eye interactions during audiovisual emotional stimulation.

Feryal A Alskafi1,2, Ahsan H Khandoker1,2, Faezeh Marzbanrad3

  • 1Department of Biomedical Engineering and Biotechnology, Khalifa University, Abu Dhabi, United Arab Emirates.

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Summary

Electroencephalography (EEG) and electrooculography (EOG) interactions reveal emotion-specific brain activity. Eye movement complexity and EEG-EOG coupling change with arousal and valence, highlighting affective processing networks.

Keywords:
EEGEEG–EOG couplingaffective neurosciencebrain–body interactionscognitionemotionsnetwork physiologytime delay stability

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Area of Science:

  • Neuroscience
  • Affective Science
  • Signal Processing

Background:

  • Electrooculography (EOG) measures eye movements but is underutilized as a physiological signal.
  • Understanding electroencephalography (EEG)-EOG coupling is crucial for affective neuroscience.

Purpose of the Study:

  • To investigate emotion-specific changes in arousal and valence reflected in EEG-EOG interactions.
  • To determine directional and frequency-specific coupling between EEG and EOG signals.

Main Methods:

  • Utilized the DEAP dataset with 32 participants viewing music videos and rating emotions.
  • Analyzed EEG signals (theta, alpha, beta, gamma bands) and EOG complexity (entropy measures).
  • Assessed EEG-EOG coupling using the controlled time delay stability (CTDS) framework.

Main Results:

  • Emotion-related differences were found in horizontal and vertical EOG complexity.
  • EEG-EOG coupling varied with emotion, strongest in gamma band at sensorimotor and frontal sites.
  • Directional EOG-to-EEG coupling was prominent at frontal, sensorimotor, and occipital sites.

Conclusions:

  • Emotional states correlate with frequency- and channel-specific shifts in EEG-EOG interactions.
  • Revealed directional dynamics linking eye movements and cortical activity in affective processing.
  • Demonstrated a structured, context-sensitive neural architecture for affective processing.