Static and dynamic low- and high-order brain functional network modulations by tDCS in children with autism spectrum disorder

Comprehensive Summary

The study reviews whether transcranial direct current stimulation (tDCS) changes static and dynamic functional network organization in children’s brains with autism. Resting-state EEG was collected before and after neurostimulation of low- and high-order networks, which were analyzed in 42 children aged 4 to 6. The researchers found that active tDCS increased the strength of lower-order connectivity in the alpha, beta, and delta bands. It also led to broader increases in higher-order connectivity across all frequency bands. The most prominent changes were in high-order networks with reduced length and increased global and local efficiency. Further analysis showed that tDCS entropy at specific time scales showed evidence of altered transitions between integrated and segregated network states. The authors emphasize that high-order networks are more sensitive to neuromodulation and could be used as markers of tDCS network reorganization.

Outcomes and Implications

This research is important because abnormal connectivity and network dynamics are common for Autism, and interventions that can modulate the physiology could be used for therapies. The paper suggests that tDCS could influence static and dynamic network organization in children and has the potential to be used as a neuromodulatory tool. This work provides preliminary markers that could help make individualized stimulation procedures. Though it has significant potential, it is still exploratory, and implementation will depend on further research to clarify its safety and functional relevance.