Passive OPM-MEG paradigm reveals altered brain network organization in children with DLD
Aimin Liang1,2, Zhijun Cui2, Jialing Wang3
1School of Instrumentation Science and Optoelectronic Engineering, Beihang University, Beijing 100191, China.
Insights
Optically pumped magnetometer magnetoencephalography revealed differences in brain network organization between typically developing children and those with developmental language disorder. Children with DLD showed more segregated brain activity during a story task, suggesting altered neural signatures.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Biophysics
Background:
- Optically pumped magnetometer magnetoencephalography (OPM-MEG) offers advanced insights into pediatric neurodevelopment.
- Understanding functional connectivity (FC) in children with developmental language disorder (DLD) is crucial for early intervention.
Purpose of the Study:
- To investigate functional connectivity (FC) changes in typically developing (TD) children and children with DLD during rest and narrative tasks.
- To identify potential neural signatures of DLD using OPM-MEG.
Main Methods:
- Investigated 30 TD children and 10 children with DLD (aged 4-7 years) using OPM-MEG.
- Compared brain activity during a "Inscapes" video (rest) and short narrative videos (story task).
- Analyzed power modulation and network modularity across different frequency bands (δ, α, β, γ).
Main Results:
- Both groups showed similar power modulation and decreased network modularity from rest to story processing.
- Children with DLD exhibited increased high-γ network modularity, indicating a more segregated neural architecture.
- TD children demonstrated enhanced low-γ FC in left-hemisphere networks during the story task, unlike children with DLD who showed weaker connectivity.
Conclusions:
- Altered γ-band network organization may represent a core neural signature of DLD.
- OPM-MEG is a promising tool for studying pediatric neurodevelopmental disorders.
- Findings highlight differences in neural processing during narrative comprehension between TD children and those with DLD.
Abstract:
Optically pumped magnetometer magnetoencephalography (OPM-MEG) enables the study of pediatric neurodevelopment during naturalistic tasks. Here, we investigated functional connectivity (FC) changes in 30 typically developing (TD) children and 10 children with developmental language disorder (DLD), aged 4-7 years, during a rest task ("Inscapes" video) and a story task (short narrative videos). Both groups exhibited similar power modulation (δ enhancement, α, β, and low-γ suppression) and decreased network modularity when transitioning from rest to story processing. However, children with DLD displayed increased high-γ network modularity, indicating a more segregated neural architecture. During the story task, TD children displayed enhanced low-γ FC within a left-hemisphere network with hubs in temporal, parietal, central, and occipital regions, whereas children with DLD showed weaker connectivity. These findings suggest that altered γ-band network organization may be a core neural signature of DLD and highlight the potential of OPM-MEG in pediatric neurodevelopmental disorders.
