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Related Experiment Video

Updated: Sep 30, 2025

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Gamma-band neural coupling during conceptual alignment.

Danni Chen1, Ruqian Zhang1, Jieqiong Liu1

  • 1Shanghai Key Laboratory of Mental Health and Psychological Crisis Intervention, Affiliated Mental Health Center (ECNU), School of Psychology and Cognitive Science, East China Normal University, Shanghai, China.

Human Brain Mapping
|March 14, 2022
PubMed
Summary
This summary is machine-generated.

Brain coupling in the gamma frequency band supports mutual understanding. Enhancing this neural synchrony with transcranial alternating current stimulation (tACS) improves conceptual alignment accuracy, crucial for effective communication.

Keywords:
EEG-based hyperscanningconceptual alignmentdual-tACSperspective-taking

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Communication Studies

Background:

  • Mutual understanding relies on conceptual alignment, but its neural basis remains unclear.
  • Interpersonal neurophysiological synchrony is vital for shared meaning.
  • Previous research lacks insight into brain-to-brain mechanisms during conceptual alignment.

Purpose of the Study:

  • Investigate brain-to-brain electroencephalogram (EEG) coupling during conceptual alignment.
  • Examine the role of gamma-band neural synchrony in successful communication.
  • Determine if transcranial alternating current stimulation (tACS) can enhance conceptual alignment.

Main Methods:

  • Simultaneous multi-channel EEG recordings from two participants.
  • Dual-transcranial alternating current stimulation (tACS) applied to the left temporoparietal (TP) area.
  • Analysis of phase-locking value (PLV) in the gamma frequency band (28-40 Hz).

Main Results:

  • Higher gamma-band PLV at the left TP site correlated with successful conceptual alignment.
  • Left TP gamma coupling strength predicted alignment accuracy and group differentiation (SUCCESS vs. FAILURE).
  • In-phase gamma-band tACS over the left TP area improved accuracy in the SUCCESS group.

Conclusions:

  • Gamma-band neural coupling between brains plays a crucial role in interpersonal conceptual alignment.
  • tACS modulation of left TP gamma synchrony offers a potential method to enhance communication accuracy.
  • Findings provide dynamic neurophysiological insights into the formation of successful communication.