Psychophysiological Markers of Vulnerability to Psychopathology in Men with an Extra X Chromosome (XXY)
Author Information
Author(s): van Rijn Sophie, Swaab Hanna, Magnée Maurice, van Engeland Herman, Kemner Chantal
Primary Institution: Leiden University, Leiden, The Netherlands
Hypothesis
Smooth pursuit and sensory gating may be atypical in individuals with Klinefelter syndrome (KS).
Conclusion
Individuals with Klinefelter syndrome showed impairments in smooth pursuit eye movements and reduced prepulse inhibition, suggesting a vulnerability to psychotic symptoms.
Supporting Evidence
- Dysfunctions in smooth pursuit eye movements were observed in individuals with KS.
- Reduced sensory gating in individuals with KS was suggested by significantly reduced prepulse inhibition of the startle response.
- No abnormalities were found in suppression of the P50.
Takeaway
Men with an extra X chromosome may have trouble following moving things with their eyes and filtering out distractions, which could make them more likely to have mental health issues.
Methodology
The study assessed smooth pursuit eye movements, prepulse inhibition, and P50 suppression in 14 men with Klinefelter syndrome and 15 non-clinical controls.
Potential Biases
Potential selection bias in recruiting participants and the small sample size may limit generalizability.
Limitations
The study had a small sample size and groups were not optimally matched for intelligence and age.
Participant Demographics
14 men with Klinefelter syndrome (XXY) and 15 non-clinical control men.
Statistical Information
P-Value
p=0.016
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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