The neural mechanisms underlying semantic unification and semanteme integration
Wenjia Zhang1, Jie Dong1, Genyi Feng2
1Key Laboratory for Artificial Intelligence and Cognitive Neuroscience of Language, Xi'an International Studies University, 710128 Xi'an, Shaanxi, China.
Brain and Language
|July 30, 2025
Summary
Semanteme integration, a key part of human language processing, shows greater brain activation and connectivity than semantic unification. This study investigated the neural basis of these language processes using fMRI.
Area of Science:
- Neuroscience
- Cognitive Science
- Linguistics
Background:
- Human language processing involves semantic unification and semanteme integration.
- Prior research primarily focused on the neural mechanisms of semantic unification.
- The distinct neural underpinnings of semanteme integration remain less understood.
Purpose of the Study:
- To investigate the neural mechanisms of both semantic unification and semanteme integration.
- To compare brain activation and functional connectivity between these two language processing components.
- To elucidate the role of the right anterior temporal lobe (RATL) and angular gyrus (AG) in language integration.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to scan participants during language tasks.
- Participants completed both semantic unification and semanteme integration tasks.
- Tasks included congruent and violated conditions to elicit neural responses.
- Regional activation and psychophysiological interaction (PPI) analyses were conducted.
Main Results:
- The violation effect (violated > congruent) showed increased activation in the right anterior temporal lobe (RATL) during semantic unification.
- Semanteme integration exhibited more widespread brain activation compared to semantic unification.
- Psychophysiological interaction (PPI) analyses revealed significant functional connectivity between RATL and bilateral angular gyrus (AG) specifically during semanteme integration.
Conclusions:
- Semanteme integration engages more extensive neural resources, including greater activation and functional connectivity, than semantic unification.
- The right anterior temporal lobe (RATL) and bilateral angular gyrus (AG) play a crucial role in semanteme integration.
- This study advances our understanding of the distinct neural correlates of fundamental human language processing components.
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