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Updated: Jan 26, 2026
Controlled Cortical Impact Model for Traumatic Brain Injury
Published on: August 5, 2014
Fronto-temporal vulnerability to disconnection in paediatric moderate and severe traumatic brain injury
E Molteni1, E Pagani2, S Strazzer1
1Acquired Brain Injury Unit, Scientific Institute IRCCS Eugenio Medea, Lecco, Italy.
Insights
Pediatric traumatic brain injury (TBI) causes widespread white matter (WM) damage and grey matter (GM) atrophy, particularly in fronto-temporal regions, impacting cognitive function and independence.
Area of Science:
- Neuroimaging
- Pediatric Neurology
- Traumatic Brain Injury Research
Background:
- Moderate and severe pediatric traumatic brain injury (TBI) can lead to significant white matter (WM) tract damage and grey matter (GM) atrophy.
- Understanding the interplay between WM and GM changes and their correlation with patient outcomes is crucial.
Purpose of the Study:
- To investigate the presence and severity of WM tract damage and GM atrophy in pediatric TBI patients.
- To explore the relationship between these neuroanatomical changes and their correlation with outcome rating scales.
Main Methods:
- Utilized diffusion tensor (DT) and 3D T1-weighted MRI scans in 22 TBI children and 31 healthy controls.
- Assessed WM tract integrity using DT MRI indices and quantified cortical lobar and deep GM volumes.
- Administered outcome rating scales and the Wechsler Intelligence Scale for Children (WISC) to evaluate patient function.
Main Results:
- Pediatric TBI patients exhibited widespread decreased WM fractional anisotropy (FA) and GM atrophy compared to controls.
- Chronic TBI patients showed more severe atrophy in the right frontal lobe and reduced FA in the left inferior longitudinal fasciculus and corpus callosum (CC).
- Abnormalities in the uncinate fasciculus correlated with frontal and temporal lobe atrophy, while hippocampal atrophy correlated with lower WISC scores.
Conclusions:
- Identified a fronto-temporal network of structures particularly vulnerable to axonal damage and atrophy following pediatric TBI.
- These neuroanatomical changes are associated with cognitive deficits and functional impairments in TBI survivors.
Background:
In patients with moderate and severe paediatric traumatic brain injury (TBI), we investigated the presence and severity of white matter (WM) tract damage, cortical lobar and deep grey matter (GM) atrophies, their interplay and their correlation with outcome rating scales.
Methods:
Diffusion tensor (DT) and 3D T1-weighted MRI scans were obtained from 22 TBI children (13 boys; mean age at insult = 11.6 years; 72.7% in chronic condition) and 31 age-matched healthy children. Patients were tested with outcome rating scales and the Wechsler Intelligence Scale for Children (WISC). DT MRI indices were obtained from several supra- and infra-tentorial WM tracts. Cortical lobar and deep GM volumes were derived. Comparisons between patients and controls, and between patients in acute (<6 months from the event) vs. chronic (≥6 months) condition were performed.
Results:
Patients showed a widespread pattern of decreased WM FA and GM atrophy. Compared to acute, chronic patients showed severer atrophy in the right frontal lobe and reduced FA in the left inferior longitudinal fasciculus and corpus callosum (CC). Decreased axial diffusivity was observed in acute patients versus controls in the inferior fronto-occipital fasciculus and CC. Chronic patients showed increased axial diffusivity in the same structures. Uncinate fasciculus DT MRI abnormalities correlated with atrophy in the frontal and temporal lobes. Hippocampal atrophy correlated with reduced WISC scores, whereas putamen atrophy correlated with lower functional independence measure scores.
Conclusions:
The study isolated a distributed fronto-temporal network of structures particularly vulnerable to axonal damage and atrophy that may contribute to cognitive deficits following TBI.
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