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Published on: September 27, 2010
Lateralisation of language function in young adults born very preterm
T M Rushe1, C M Temple, L Rifkin
1Department of Psychology, University of Ulster at Jordanstown, N Ireland BT37 0QB, UK. tm.rushe@ulst.ac.uk
Archives of Disease in Childhood. Fetal and Neonatal Edition
|February 24, 2004
Summary
Young adults born very preterm with corpus callosum thinning show altered brain activity during phonological processing. This neurodevelopmental difference suggests compensatory mechanisms may be at play.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Cognitive Neuroscience
Background:
- Very preterm birth is associated with neurodevelopmental challenges.
- The corpus callosum facilitates interhemispheric communication, crucial for cognitive functions.
- Phonological processing is a key component of language development and reading.
Purpose of the Study:
- To investigate the functional brain organization of phonological processing in young adults born very preterm.
- To examine differences in brain activation patterns between preterm individuals with corpus callosum thinning and controls.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to assess brain activity.
- Participants performed phonological (rhyme detection) and orthographic (letter case judgment) tasks.
- Analysis compared brain activation maps between preterm subjects and healthy controls.
Main Results:
- Preterm subjects with corpus callosum thinning exhibited reduced activation in left hemisphere regions (peristriate cortex, cerebellum) and the right parietal association area.
- Increased activation was observed in the right precentral gyrus and supplementary motor area in the preterm group.
- These findings indicate altered functional organization in phonological processing.
Conclusions:
- The study provides evidence for altered brain activation patterns in very preterm adults with corpus callosum thinning.
- Increased frontal and decreased occipital activation suggest potential developmental compensatory mechanisms.
- These neurodevelopmental differences may impact language and cognitive outcomes.
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