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The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia
Published on: November 19, 2008
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Right Structural and Functional Reorganization in Four-Year-Old Children with Perinatal Arterial Ischemic Stroke
Clément François1,2, Pablo Ripollés3, Laura Ferreri1,2
1Cognition and Brain Plasticity Group, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona 08907, Spain.
Eneuro
|August 7, 2019
Summary
Children with left perinatal stroke show right hemisphere language reorganization, with greater rightward brain connectivity linked to better language skills. This suggests the right hemisphere can compensate for early left-sided brain damage.
Area of Science:
- Neuroscience
- Developmental Psychology
- Pediatric Neurology
Background:
- Early brain insult, particularly perinatal stroke, can impact neurodevelopmental trajectories.
- The capacity of the right hemisphere to compensate for language deficits following left-hemisphere injury remains an area of active research.
Purpose of the Study:
- To investigate the association between structural and functional brain reorganization and language outcomes in children with left perinatal arterial ischemic stroke (PAIS).
- To examine hemispheric language lateralization in children with PAIS compared to healthy controls.
Main Methods:
- Collected detailed language and cognitive development measures in four-year-old children with PAIS.
- Acquired structural neuroimaging and functional magnetic resonance imaging (fMRI) data, including resting-state (rs-fMRI) and a story-telling task.
- Analyzed structural and functional connectivity of the dorsal language pathway.
Main Results:
- Children with left PAIS exhibited increased rightward lateralization of structural and functional connectivity in the dorsal language pathway.
- Greater rightward lateralization correlated with improved receptive and productive language outcomes.
- Structural asymmetry was significantly more pronounced in the right hemisphere for children with PAIS compared to controls.
Conclusions:
- Early left-sided perisylvian lesions can induce significant interhemispheric transfer of language functions to right hemisphere homolog regions.
- Combined structural and functional brain reorganization supports language network adaptation after early stroke.
- Findings have implications for understanding neurobiological models of language development and recovery.
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