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Early-Life Clinical Factors Shape Cerebellar Structure in Preterm-Born Children
Victoria Rapos1,2, Steven Ufkes1,2, Cecil Chau1,2
1Department of Pediatrics University of British Columbia Vancouver British Columbia Canada.
Annals of the Child Neurology Society
|August 7, 2026
Summary
Neonatal illness and procedures in very preterm infants impact cerebellar development, leading to reduced volumes and connectivity. This affects cognitive and motor skills at school age.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Medical Imaging
Background:
- Preterm birth significantly impacts brain development, with neonatal factors like illness and interventions posing risks.
- Cerebellar development is crucial for motor and cognitive functions, but its long-term association with early life exposures in preterm infants is not fully understood.
Purpose of the Study:
- To investigate the relationship between neonatal clinical factors and specific cerebellar volumes and white matter pathways at 8 years of age in children born very preterm.
- To explore how cerebellar structure relates to cognitive and motor outcomes in this population.
Main Methods:
- Neuroimaging (CerebNet segmentation, tractography) and clinical data were collected from 130 very preterm children (24-32 weeks gestational age).
- Constrained principal component analysis examined associations between neonatal factors and cerebellar subregion volumes.
- Tractography assessed cerebellar white matter connectivity and its relation to neurodevelopmental outcomes.
Main Results:
- Neonatal factors such as mechanical ventilation, invasive procedures, and opioid exposure were linked to reduced cerebellar volumes.
- Higher neonatal mortality risk (SNAPPE-II) correlated with decreased cerebellar connectivity at 8 years.
- Reduced cerebellar volume and connectivity were associated with poorer cognitive and motor performance.
Conclusions:
- In very preterm children, neonatal illness severity and exposure to invasive procedures/opioids negatively affect cerebellar development.
- These structural changes in the cerebellum are associated with impaired cognitive and motor outcomes in school-aged children.
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