Sex differences in white matter development during adolescence: A DTI study

Yingying Wang, Chris Adamson, Weihong Yuan, Mekibib Altaye, Akila Rajagopal, Anna W. Byars, Scott K. Holland

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Adolescence is a complex transitional period in human development, composing physical maturation, cognitive and social behavioral changes. The objective of this study is to investigate sex differences in white matter development and the associations between intelligence and white matter microstructure in the adolescent brain using diffusion tensor imaging (DTI) and tract-based spatial statistics (TBSS). In a cohort of 16 typically-developing adolescents aged 13 to 17 years, longitudinal DTI data were recorded from each subject at two time points that were one year apart. We used TBSS to analyze the diffusion indices including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD). Our results suggest that boys (13-18 years) continued to demonstrate white matter maturation, whereas girls appeared to reach mature levels earlier. In addition, we identified significant positive correlations between FA and full-scale intelligence quotient (IQ) in the right inferior fronto-occipital fasciculus when both sexes were looked at together. Only girls showed significant positive correlations between FA and verbal IQ in the left cortico-spinal tract and superior longitudinal fasciculus. The preliminary evidence presented in this study supports that boys and girls have different developmental trajectories in white matter microstructure.

Original languageEnglish (US)
Pages (from-to)1-15
Number of pages15
JournalBrain Research
Volume1478
DOIs
StatePublished - Oct 10 2012

Keywords

  • Adolescence
  • Diffusion tensor imaging
  • Sex differences
  • Tract based spatial statistics
  • White matter development

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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