Key result
A novel dynamic brain network using EEG signals and channel norm information features revealed significant differences in brain activity between high and low arousal states.
Why the study?
Existing methods for emotion analysis lacked adequate time resolution and consideration of arousal conditions to assess brain states using EEG signals.
A novel dynamic brain network method using EEG signals can quantify and evaluate brain activity under different arousal conditions, improving emotion analysis.
Dynamic EEG networks may aid arousal-based emotion research; leaves open clinical validation and utility.
BACKGROUND: Brain network can be well used in emotion analysis to analyze the brain state of subjects. A novel dynamic brain network in arousal is proposed to analyze brain states and emotion with Electroencephalography (EEG) signals. New Method: Time factors is integrated to construct a dynamic brain network under high and low arousal conditions. The transfer entropy is adopted in the dynamic brain network. In order to ensure the authenticity of dynamics and connections, surrogate data are used for testing and analysis. Channel norm information features are proposed to optimize the data and evaluate the level of activity of the brain. RESULTS: The frontal lobe, temporal lobe, and parietal lobe provide the most information about emotion arousal. The corresponding stimulation state is not maintained at all times. The number of active brain networks under high arousal conditions is generally higher than those under low arousal conditions. More consecutive networks show high activity under high arousal conditions among these active brain networks. The results of the significance analysis of the features indicates that there is a significant difference between high and low arousal. Comparison with Existing Method(s): Compared with traditional methods, the method proposed in this paper can analyze the changes of subjects' brain state over time in more detail. The proposed features can be used to quantify the brain network for accurate analysis. CONCLUSIONS: The proposed dynamic brain network bridges the research gaps in lacking time resolution and arousal conditions in emotion analysis. We can clearly get the dynamic changes of the overall and local details of the brain under high and low arousal conditions. Furthermore, the active segments and brain regions of the subjects were quantified and evaluated by channel norm information.This method can be used to realize the feature extraction and dynamic analysis of the arousal dimension of emotional EEG, further explore the emotional dimension model, and also play an auxiliary role in emotional analysis.
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Gao et al. (2021) studied Emotion analysis and brain states. Dynamic brain network in arousal with channel norm information features vs. Traditional methods was evaluated on Difference between high and low arousal states. A novel dynamic brain network using EEG signals and channel norm information features revealed significant differences in brain activity between high and low arousal states.
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