Journal Article DZNE-2020-07428

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Mapping cortical brain asymmetry in 17,141 healthy individuals worldwide via the ENIGMA Consortium.

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2018
National Acad. of Sciences Washington, DC

Proceedings of the National Academy of Sciences of the United States of America 115(22), E5154-E5163 () [10.1073/pnas.1718418115]

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Abstract: Hemispheric asymmetry is a cardinal feature of human brain organization. Altered brain asymmetry has also been linked to some cognitive and neuropsychiatric disorders. Here, the ENIGMA (Enhancing NeuroImaging Genetics through Meta-Analysis) Consortium presents the largest-ever analysis of cerebral cortical asymmetry and its variability across individuals. Cortical thickness and surface area were assessed in MRI scans of 17,141 healthy individuals from 99 datasets worldwide. Results revealed widespread asymmetries at both hemispheric and regional levels, with a generally thicker cortex but smaller surface area in the left hemisphere relative to the right. Regionally, asymmetries of cortical thickness and/or surface area were found in the inferior frontal gyrus, transverse temporal gyrus, parahippocampal gyrus, and entorhinal cortex. These regions are involved in lateralized functions, including language and visuospatial processing. In addition to population-level asymmetries, variability in brain asymmetry was related to sex, age, and intracranial volume. Interestingly, we did not find significant associations between asymmetries and handedness. Finally, with two independent pedigree datasets (n = 1,443 and 1,113, respectively), we found several asymmetries showing significant, replicable heritability. The structural asymmetries identified and their variabilities and heritability provide a reference resource for future studies on the genetic basis of brain asymmetry and altered laterality in cognitive, neurological, and psychiatric disorders.

Keyword(s): Adolescent (MeSH) ; Adult (MeSH) ; Aged (MeSH) ; Aged, 80 and over (MeSH) ; Cerebral Cortex: diagnostic imaging (MeSH) ; Child (MeSH) ; Child, Preschool (MeSH) ; Databases, Factual: statistics & numerical data (MeSH) ; Female (MeSH) ; Humans (MeSH) ; Infant (MeSH) ; Male (MeSH) ; Middle Aged (MeSH) ; Neuroimaging: methods (MeSH) ; Young Adult (MeSH)

Classification:

Contributing Institute(s):
  1. Biomarkers of dementia in the general population (AG Grabe)
Research Program(s):
  1. 344 - Clinical and Health Care Research (POF3-344) (POF3-344)

Appears in the scientific report 2018
Database coverage:
Medline ; BIOSIS Previews ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Ebsco Academic Search ; IF >= 10 ; JCR ; National-Konsortium ; SCOPUS ; Web of Science Core Collection ; Zoological Record
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Document types > Articles > Journal Article
Institute Collections > ROS DZNE > ROS DZNE-AG Grabe
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 Record created 2020-02-18, last modified 2024-03-21


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