Back to Search
Start Over
Neuroanatomical Diversity of Corpus Callosum and Brain Volume in Autism: Meta-analysis, Analysis of the Autism Brain Imaging Data Exchange Project, and Simulation
- Source :
- Biological Psychiatry, Biological Psychiatry, 2015, 78 (2), pp.126-34. ⟨10.1016/j.biopsych.2015.02.010⟩, Biological Psychiatry, Elsevier, 2015, 78 (2), pp.126-34. ⟨10.1016/j.biopsych.2015.02.010⟩
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- International audience; Background:Patients with autism have been often reported to have a smaller corpus callosum (CC) than control subjects.; Methods:We conducted a meta-analysis of the literature, analyzed the CC in 694 subjects of the Autism Brain Imaging Data Exchange project, and performed computer simulations to study the effect of different analysis strategies.; Results:Our meta-analysis suggested a group difference in CC size; however, the studies were heavily underpowered (20% power to detect Cohen's d = .3). In contrast, we did not observe significant differences in the Autism Brain Imaging Data Exchange cohort, despite having achieved 99% power. However, we observed that CC scaled nonlinearly with brain volume (BV): large brains had a proportionally smaller CC. Our simulations showed that because of this nonlinearity, CC normalization could not control for eventual BV differences, but using BV as a covariate in a linear model would. We also observed a weaker correlation of IQ and BV in cases compared with control subjects. Our simulations showed that matching populations by IQ could then induce artifactual BV differences.; Conclusions:The lack of statistical power in the previous literature prevents us from establishing the reality of the claims of a smaller CC in autism, and our own analyses did not find any. However, the nonlinear relationship between CC and BV and the different correlation between BV and IQ in cases and control subjects may induce artifactual differences. Overall, our results highlight the necessity for open data sharing to provide a more solid ground for the discovery of neuroimaging biomarkers within the context of the wide human neuroanatomical diversity.
- Subjects :
- Adult
Male
Adolescent
Databases, Factual
Autism
Corpus callosum
[SDV]Life Sciences [q-bio]
Intelligence
MESH: Autistic Disorder
Context (language use)
MESH: Corpus Callosum
Correlation
Young Adult
MESH: Brain
[SCCO]Cognitive science
MESH: Child
medicine
Humans
MESH: Intelligence
Autistic Disorder
Child
Biological Psychiatry
MESH: Adolescent
Brain volume
MESH: Humans
MESH: Child, Preschool
Linear model
Brain
Contrast (statistics)
MESH: Adult
medicine.disease
MESH: Databases, Factual
MESH: Male
Meta-analysis
MESH: Young Adult
Child, Preschool
[SDV.MHEP.PSM]Life Sciences [q-bio]/Human health and pathology/Psychiatrics and mental health
Brain size
Computational neuroanatomy
Female
Statistical power
Psychology
MESH: Female
Neuroscience
Subjects
Details
- ISSN :
- 00063223
- Volume :
- 78
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Biological Psychiatry
- Accession number :
- edsair.doi.dedup.....d99c769cf3806f2e6f2abebed9a0858f
- Full Text :
- https://doi.org/10.1016/j.biopsych.2015.02.010