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Abnormal cerebral structure is present at term in premature infants
Terrie E Inder1, Simon K Warfield, Hong Wang
1Murdoch Children's Research Institute, Royal Women's Hospital, University of Melbourne, Melbourne, Australia. terrie.inder@rch.org.au
Pediatrics
|February 3, 2005
Summary
Very premature infants show reduced gray matter and increased cerebrospinal fluid volumes at term equivalent, linked to white matter injury and poor neurodevelopmental outcomes.
Area of Science:
- Neuroscience
- Neonatal Medicine
- Radiology
Background:
- Very premature infants often experience significant motor, cognitive, and behavioral deficits.
- The underlying cerebral abnormalities contributing to these adverse outcomes are not fully understood.
- Understanding early brain structure is crucial for predicting neurodevelopmental trajectories.
Purpose of the Study:
- To quantitatively assess cerebral tissue volume alterations in very low birth weight premature infants at term equivalent using 3D MRI.
- To investigate the relationship between perinatal factors (e.g., white matter injury) and structural brain changes.
- To correlate these structural alterations with short-term neurodevelopmental outcomes.
Main Methods:
- A longitudinal cohort study involving 119 premature infants and 21 term-born controls.
- Advanced 3D magnetic resonance imaging (MRI) techniques were used to estimate volumes of gray matter (GM), white matter (WM), and cerebrospinal fluid (CSF) at term equivalent.
- Data analysis focused on quantitative volumetric measurements and correlations with perinatal factors and neurodevelopmental assessments.
Main Results:
- Premature infants exhibited significantly reduced cortical GM and deep nuclear GM volumes compared to term-born infants.
- Premature infants also showed increased cerebrospinal fluid (CSF) volumes.
- Gestational age at birth and the presence of white matter (WM) injury were major predictors of altered cerebral volumes; reduced GM and increased CSF volumes correlated with moderate to severe neurodevelopmental disability at one year.
Conclusions:
- Quantitative MRI reveals significant cerebral structural abnormalities in premature infants as early as term equivalent, primarily affecting neuronal regions (cortex and deep nuclei).
- These brain alterations are strongly associated with the degree of prematurity and white matter (WM) injury.
- The observed structural changes are predictive of abnormal short-term neurodevelopmental outcomes.