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Increased gyrification in Williams syndrome: evidence using 3D MRI methods
J Eric Schmitt1, Katie Watts, Stephan Eliez
1Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, CA 94305-5719, USA.
Developmental Medicine and Child Neurology
|May 30, 2002
Summary
Williams syndrome (WS), a genetic disorder, shows increased brain gyrification, particularly in specific regions. This finding offers insights into the neurodevelopmental origins of WS behavioral traits.
Area of Science:
- Neurodevelopmental disorders
- Neurogenetics
- Brain morphology
Background:
- Williams syndrome (WS) is a neurogenetic disorder caused by a deletion on chromosome 7q11.23.
- Individuals with WS exhibit a distinct pattern of cognitive strengths and weaknesses.
- Previous research suggested potential anomalies in brain folding in WS.
Purpose of the Study:
- To investigate gyrification patterns in individuals with Williams syndrome.
- To explore the relationship between genetic factors in WS and cortical development.
- To understand the neuroanatomical basis of WS-related behavioral phenotypes.
Main Methods:
- Utilized advanced automated magnetic resonance imaging (MRI) techniques.
- Compared gyrification patterns in 17 participants with WS and 17 age/sex-matched controls.
- Analyzed global and regional cortical folding differences.
Main Results:
- Significantly increased global cortical gyrification was observed in individuals with WS.
- Abnormalities in gyrification were most pronounced in the right parietal, right occipital, and left frontal regions.
- These findings suggest a critical role for genes in the 7q11.23 region during cortical development.
Conclusions:
- Genes within the 7q11.23 region influence critical periods of cortical folding.
- Altered gyrification in WS may contribute to the observed dorsal/ventral cognitive dissociation.
- This study enhances understanding of the neurodevelopmental etiology of Williams syndrome.