Executive Dysfunction in Klinefelter Syndrome: Associations With Brain Activation and Testicular Failure
Authors' conclusion
These findings indicate a neural basis for executive dysfunction in KS and suggest alterations in pubertal development may contribute to increased severity of this cognitive weakness. Future studies that examine whether these patterns change with testosterone replacement therapy are warranted.
Study context
- Population
- Adolescent boys with and without Klinefelter syndrome (KS) undergoing pubertal evaluation, behavioral assessment and functional magnetic resonance imaging (fMRI) during a go/no-go executive function task
- Participants
- 43 vs 41
- Exposure
- Adolescents with KS vs typically developing boys
- KSn = 43
- Typically developingn = 41reference
- Outcome
- Group differences in brain activation during the go/no-go task
Methodological detailscase-control, fMRI
- Case-control
- fMRI
Main finding
As reported in the abstract
- Boys with KS had reduced executive function
- Lower activation in KS in regions subserving executive function: inferior frontal gyrus, anterior insula, dorsal anterior cingulate cortex, caudate nucleus
Observational data: associations, not effects.
Further findings
Association of activation differences in KS with pubertal delay
- Lower testosterone
- t(36) = 2.285; P = .028
- Lower testes volume
- t(36) = 2.238; P = .031
Parent-reported attention difficulties and testicular volume
- Greater attention difficulties associated with lower testicular volume
- t(36) = −2.028; P = .050
Original publication
Executive Dysfunction in Klinefelter Syndrome: Associations With Brain Activation and Testicular Failure. J Clin Endocrinol Metab. Published 18 August 2023. doi:10.
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