Neuroradiology

, Volume 55, Issue 6, pp 697–707 | Cite as

Sex differences in cortical thickness in middle aged and early old-aged adults: Personality and Total Health Through Life study

  • Prapti Gautam
  • Nicolas Cherbuin
  • Perminder S. Sachdev
  • Wei Wen
  • Kaarin J. Anstey
Diagnostic Neuroradiology

Abstract

Introduction

The study investigated sex differences in cortical thickness in middle-aged (MA, 44–48 years old, n = 397) and early old-aged (OA, 64–68 years old, n = 398) adults in a community-based sample.

Methods

T1-weighted three-dimensional structural magnetic resonance imaging scans were acquired in a Fast Field Echo sequence, and cortical thickness was measured with a surface-based segmentation procedure (http://surfer.nmr.mgh.harvard.edu).

Results

Results showed that after correcting for age, MA males had predominantly thicker superior temporal cortices, while MA females had thicker occipital, posterior cingulate, precentral, and postcentral cortices. Sex differences in OA adults were less prominent than those in MA adults with females showing thicker temporal and posterior cingulate cortices and males showing thicker rostral middle frontal regions. Between-cohort comparisons revealed that when compared with MA males, OA males showed many regions with significantly thinner cortices, but this pattern was less pronounced for OA females. Our results suggest that sex differences in cortical thickness are age specific, as larger differences in cortical thickness were found in MA compared to OA adults.

Conclusion

The results of the present study indicate that the inconsistencies in sexual dimorphism that have been reported in the literature are partly due to the variable and transitory nature of cortical thickness differences with age.

Keywords

MRI Sex differences 

Supplementary material

234_2013_1144_MOESM1_ESM.docx (2.1 mb)
ESM 1(DOCX 2143 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Prapti Gautam
    • 1
  • Nicolas Cherbuin
    • 1
  • Perminder S. Sachdev
    • 2
    • 3
  • Wei Wen
    • 2
    • 3
  • Kaarin J. Anstey
    • 1
  1. 1.Centre for Research on Ageing Health and WellbeingAustralian National UniversityCanberraAustralia
  2. 2.School of PsychiatryUniversity of New South WalesSydneyAustralia
  3. 3.Neuropsychiatric InstituteSydneyAustralia

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