Cited by 49Advanced Neuroimaging Techniques and ApplicationsSex and Gender in HealthcareAdvanced MRI Techniques and Applications

Sex dimorphism in the white matter: Fractional anisotropy and brain size

Takao, Hidemasa, Hayashi, Naoto, Ohtomo, Kuni·2014·Journal of Magnetic Resonance Imaging

Abstract

Purpose: To examine sex differences in fractional anisotropy of the white matter across the whole brain, controlling for head size variation. Materials and Methods: A total of 238 normal subjects aged 40–49 years were included in this study. Diffusion tensor images were acquired at 3 Tesla using a single‐shot spin‐echo echo‐planar sequence. With use of tract‐based spatial statistics (TBSS), sex differences in fractional anisotropy of the white matter were examined across the whole brain, without and with adjustment of total intracranial volume. Voxelwise analyses of the processed fractional anisotropy data were performed using permutation‐based, voxelwise nonparametric testing. Results: TBSS analysis without adjustment for total intracranial volume showed several regions with a significant effect of sex on fractional anisotropy; these included the splenium of the corpus callosum, bilateral superior corona radiata, and posterior limbs of the internal capsule, midbrain, and cerebellum. Significantly higher fractional anisotropy was seen in males compared with females in these regions. TBSS analysis with adjustment for total intracranial volume, however, showed a greatly reduced number of such regions. Conclusion: The results of our study suggest that sex differences in fractional anisotropy of the white matter reported by previous studies may partly reflect differences in head size, not microscopic differences. J. Magn. Reson. Imaging 2014;39:917–923. © 2013 Wiley Periodicals, Inc.

Integrity signals

Registry

Crossref · 10.1002/jmri.24225

Cites

52 of 52 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Adult studies suggest males have higher FA, higher AD, and lower RD in widespread white-matter regions.

    “studies in adults suggest that males have higher FA, higher AD, and lower RD in widespread white-matter regions131–135.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Takao, H., Hayashi, N., & Ohtomo, K.
Affiliations
The University of Tokyo (JP)
Corresponding author
Takao, Hidemasa
Venue
Journal of Magnetic Resonance Imaging
Publisher
Wiley
Published
2013-10-07
Volume
39
Issue
4
Pages
917-923
ISSN
  • 1053-1807 (ISSN-L)
  • 1522-2586
OpenAlex
W1513772712
Cited by
49
References
52
Citations by year
2026: 1 · 2025: 2 · 2024: 6 · 2023: 5 · 2022: 13 · 2021: 5 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 9 · 2015: 2
FWCI
2.84
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Magnetic Resonance Imaging (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Sex and Gender in Healthcare
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
sex differences, white matter, fractional anisotropy, brain size, intracranial volume, head size, corpus callosum, corona radiata, internal capsule, midbrain, cerebellum, diffusion tensor imaging, tract-based spatial statistics
MeSH terms
Adult, Brain, Female, Humans, Image Enhancement, Image Interpretation, Computer-Assisted, Male, Middle Aged, Nerve Fibers, Myelinated, Organ Size, Reference Values, Sensitivity and Specificity, Sex Factors, Reproducibility of Results, Anisotropy, Imaging, Three-Dimensional, Diffusion Tensor Imaging

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review