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Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
Published on: November 19, 2012
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Regional and Global Changes in Brain Structure 1-Year Post Pediatric "Mild" Traumatic Brain Injury
Upasana Nathaniel1, Tracey V Wick1, Josef L Ling1
1The Mind Research Network/Lovelace Biomedical Research Institute, Albuquerque, NM, USA.
Annals of Neurology
|June 6, 2025
Summary
Pediatric mild traumatic brain injuries (pmTBI) can alter brain development, with severity linked to brain age and hippocampal changes. Objective biomarkers are crucial for understanding long-term pmTBI effects.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Pediatric Traumatology
Background:
- Pediatric mild traumatic brain injury (pmTBI) is common, yet its long-term structural brain effects during neurodevelopment are poorly understood.
- Assessing pmTBI's impact requires accounting for dynamic neurodevelopmental changes and regional specificity.
Purpose of the Study:
- To investigate the long-term effects of pmTBI on global and regional brain structure.
- To determine how pmTBI influences neurodevelopmental trajectories in children and adolescents.
Main Methods:
- Prospective longitudinal study design with neuroimaging at 7 days, 4 months, and 1 year post-injury.
- Inclusion of 269 pmTBI cases and 232 age/sex-matched healthy controls.
- Assessment of brain age, hippocampal volume, subfields, and cortical thickness.
Main Results:
- pmTBI associated with increased brain age, frontal cortical thickness, and hippocampal atrophy up to 1 year post-injury.
- Injury severity showed a dose-dependent effect on hippocampal neurodevelopment, including the CA1 subfield.
- Post-concussive symptoms did not correlate with observed structural brain changes.
Conclusions:
- Injury severity in pmTBI is dose-dependently related to alterations in global and regional brain structure.
- Objective biomarkers are superior to subjective symptoms for evaluating long-term pmTBI consequences.
- Findings highlight the need for objective measures in understanding pediatric TBI impacts.
