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Cortical anomalies associated with visuospatial processing deficits

Elizabeth B Isaacs1, Caroline J Edmonds, Wui K Chong

  • 1MRC Childhood Nutrition Research Centre, Institute of Child Health, University College, London, United Kingdom. e.isaacs@ich.ucl.ac.uk

Annals of Neurology
|June 5, 2003
PubMed

Insights

Children born preterm with normal neurological status showed specific brain structure differences. These cortical anomalies in the right ventral extrastriate cortex may explain their impaired judgment of line orientation skills.

Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Neuroimaging

Background:

  • Children born preterm often exhibit functional deficits despite normal neurological status.
  • Preterm birth can impact brain development and structure-function relationships.
  • Judgment of line orientation is a visuospatial skill sensitive to subtle neurological differences.

Purpose of the Study:

  • To investigate the relationship between brain structure and impaired judgment of line orientation in preterm adolescents.
  • To identify specific neuroanatomical correlates of visuospatial deficits in this population.

Main Methods:

  • Voxel-based morphometry (VBM) analysis of magnetic resonance imaging (MRI) scans.
  • Comparison of brain structure in preterm adolescents with and without specific functional deficits.
  • Assessment of judgment of line orientation task performance.

Main Results:

  • Preterm adolescents with impaired judgment of line orientation showed decreased gray matter and increased white matter in the right ventral extrastriate cortex.
  • These structural anomalies were observed despite normal neurological examinations and conventional MRI findings.
  • The identified brain regions are anatomically close to areas previously associated with line orientation processing.

Conclusions:

  • Subtle anomalies in cortical architecture, particularly in the right ventral extrastriate cortex, are associated with impaired judgment of line orientation in preterm adolescents.
  • Voxel-based morphometry can detect structural differences not apparent on conventional MRI in preterm individuals.
  • These findings highlight the importance of examining cortical architecture for understanding neurodevelopmental outcomes after preterm birth.

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