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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
Published on: September 12, 2011
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Abnormal resting-state brain network dynamics in toddlers with autism spectrum disorder
Xiuxian Li1,2, Shengjuan Wu3, Wenzhong Yang4
1National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance Spectroscopy and Imaging, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, China.
European Child & Adolescent Psychiatry
|January 24, 2025
Summary
Autism spectrum disorder (ASD) toddlers show altered brain network dynamics, with differences in global and visual network states. These changes correlate with specific autism behaviors, aiding early identification.
Area of Science:
- Neuroscience
- Developmental Psychology
- Medical Imaging
Background:
- Autism spectrum disorder (ASD) is associated with abnormal brain functional connectivity (FC) across development.
- Limited research exists on dynamic FC alterations in toddlers with ASD.
Purpose of the Study:
- To investigate brain network dynamics in toddlers with ASD.
- To identify differences in temporal properties of brain states between ASD and typically developing (TD) toddlers.
- To correlate these dynamic FC differences with autistic behaviors.
Main Methods:
- Resting-state functional magnetic resonance imaging (fMRI) data from 41 ASD and 23 TD toddlers (15-45 months).
- Leading eigenvector dynamics analysis to assess brain network temporal properties.
- Correlation analysis between dynamic FC metrics and Autism Behavior Checklist (ABC) scores.
Main Results:
- ASD toddlers exhibited lower occurrence and mean dwell time in the global state compared to TD toddlers.
- The global state's mean dwell time negatively correlated with body/object use in ASD.
- ASD toddlers showed higher visual network state probability, positively correlating with relationship building.
- Dorsal attention and default mode network states positively correlated with body/object use in ASD.
Conclusions:
- Significant differences exist in large-scale brain functional network development patterns in toddlers with ASD.
- These findings offer insights into neural mechanisms underlying ASD in early childhood.
- Altered brain network dynamics may aid in the early identification of ASD.
