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Published on: April 5, 2012
Genetic topography of brain morphology
Chi-Hua Chen1, Mark Fiecas, E D Gutiérrez
1Departments of Psychiatry, Cognitive Science, Radiology, and Neurosciences, Center for Behavioral Genomics, and Institute of Genomic Medicine, University of California, San Diego, La Jolla, CA 92093.
Summary
Genetic influences shape human brain cortical thickness along the dorsal-ventral axis. Cortical thickness and surface area exhibit distinct genetic patterning, revealing complex brain development principles.
Area of Science:
- Neuroscience
- Human Genetics
- Brain Development
Background:
- Cortical development in animals is patterned by genetic gradients along orthogonal axes.
- Previous research identified anterior-posterior genetic influences on human cortical surface area.
- Understanding genetic influences on cortical morphology is crucial for deciphering brain development.
Purpose of the Study:
- To investigate genetic influences on cortical thickness along the dorsal-ventral axis in adult humans.
- To compare the genetic patterning of cortical thickness versus cortical surface area.
- To explore the relationship between genetic organization and cortical functional specialization.
Main Methods:
- Utilized neuroimaging data from adult human twins.
- Analyzed genetic influences on cortical thickness along the dorsal-ventral axis.
- Compared genetic similarity matrices for cortical thickness and surface area.
Main Results:
- Demonstrated distinct genetic influences on cortical thickness along the dorsal-ventral axis.
- Found minimal genetic correlation between cortical thickness and surface area.
- Identified differing genetic organizing principles: surface area clusters by lobe, thickness clusters by maturational timing.
Conclusions:
- Genetic patterning of cortical thickness and surface area follows distinct principles, reflecting different neurodevelopmental mechanisms.
- Genetic influences on cortical morphology are complex and spatially organized.
- Findings provide insights into the genetic basis of cortical organization and functional specialization.
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