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Greater male than female variability in regional brain structure across the lifespan
Journal article   Open access   Peer reviewed

Greater male than female variability in regional brain structure across the lifespan

Lara M Wierenga, Gaelle E Doucet, Danai Dima, Ingrid Agartz, Moji Aghajani, Theophilus N Akudjedu, Anton Albajes-Eizagirre, Dag Alnaes, Kathryn I Alpert, Ole A Andreassen, …
Human Brain Mapping, Vol.43(1), pp.470-499
2022
PMCID: PMC8675415
PMID: 33044802
pdf
Greater male than female variability in regional brain structure across the lifespan - VoR4.27 MBDownloadView
Published Version Open Access CC BY V4.0
url
https://doi.org/10.1002/hbm.25204View
Published Version

Abstract

Other Collaborations Thompson Institute Special Collection
For many traits, males show greater variability than females, with possible implications for understanding sex differences in health and disease. Here, the ENIGMA (Enhancing Neuro Imaging Genetics through Meta‐Analysis) Consortium presents the largest‐ever mega‐analysis of sex differences in variability of brain structure, based on international data spanning nine decades of life. Subcortical volumes, cortical surface area and cortical thickness were assessed in MRI data of 16,683 healthy individuals 1‐90 years old (47% females). We observed significant patterns of greater male than female between‐subject variance for all subcortical volumetric measures, all cortical surface area measures, and 60% of cortical thickness measures. This pattern was stable across the lifespan for 50% of the subcortical structures, 70% of the regional area measures, and nearly all regions for thickness. Our findings that these sex differences are present in childhood implicate early life genetic or gene‐environment interaction mechanisms. The findings highlight the importance of individual differences within the sexes, that may underpin sex‐specific vulnerability to disorders.

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Neuroimaging
Neurosciences
Radiology, Nuclear Medicine & Medical Imaging

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