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Non-Invasive Modulation and Robotic Mapping of Motor Cortex in the Developing Brain
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Dosage considerations for transcranial direct current stimulation in children: a computational modeling study.

Sudha Kilaru Kessler1, Preet Minhas, Adam J Woods

  • 1Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America.

Plos One
|October 3, 2013
PubMed
Summary

Children may experience higher peak electrical fields during transcranial direct current stimulation (tDCS) compared to adults. Dose adjustments for pediatric tDCS require careful consideration due to anatomical differences and montage specificity.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Medical Physics

Background:

  • Transcranial direct current stimulation (tDCS) is a therapeutic modality for brain disorders.
  • Growing interest exists in tDCS applications for children, with preliminary data suggesting good tolerability.
  • Dose selection for pediatric tDCS requires careful consideration due to potential differences in neurophysiology and anatomy compared to adults.

Purpose of the Study:

  • To compare electric field intensity and distribution in children and adults using finite element modeling.
  • To investigate the impact of anatomical differences on tDCS dose in pediatric populations.
  • To inform safe and effective tDCS protocols for children.

Main Methods:

  • High-resolution MRI-derived finite element modeling simulations were used.
  • Models included two healthy children (8 and 12 years) and three healthy adults.
  • Multiple conventional and high-definition tDCS montages were simulated.

Main Results:

  • On average, children are predicted to experience higher peak electrical fields than adults for a given tDCS current intensity.
  • Significant overlap in electrical field exposure exists between adults with smaller head sizes and children.
  • Electric field variations were observed between pediatric models, highlighting the influence of neuroanatomy on bioavailable current dose.

Conclusions:

  • Caution is advised when using higher tDCS doses in children.
  • Further modeling studies in larger pediatric cohorts are needed to establish dose-age-exposure relationships.
  • Correlation of modeling-based dose estimates with physiological effects is crucial for validating pediatric tDCS protocols.