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Updated: Jun 27, 2026

Measurement of Fronto-limbic Activity Using an Emotional Oddball Task in Children with Familial High Risk for Schizophrenia
Published on: December 2, 2015
Genetic overlap among intelligence and other candidate endophenotypes for schizophrenia
Maartje F Aukes1, Behrooz Z Alizadeh, Margriet M Sitskoorn
1Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, the Netherlands. m.aukes@umcutrecht.nl
Intelligence shows significant genetic overlap with schizophrenia endophenotypes, suggesting its potential as a valuable marker in genetic studies. Other endophenotypes like sensorimotor gating may represent distinct genetic pathways.
Area of Science:
- Psychiatric Genetics
- Cognitive Neuroscience
Background:
- Schizophrenia genetic research benefits from endophenotype analysis.
- Overlapping genetic contributions among endophenotypes can enhance study power and reveal biological pathways.
- Intelligence is a cognitive trait likely influenced by shared genetic factors with schizophrenia.
Purpose of the Study:
- To quantify genetic and environmental correlations among schizophrenia endophenotypes.
- To investigate the role of intelligence as a potential endophenotype for schizophrenia.
- To explore distinct genetic pathways for different endophenotypes.
Main Methods:
- Variance component models were applied to 35 patients and 145 relatives from 25 Dutch families affected by schizophrenia.
- Genetic and environmental correlations were assessed for sensorimotor gating, openness, verbal fluency, early visual perception, spatial working memory, and intelligence.
Main Results:
- Strong genetic correlation (0.75) found between spatial working memory and intelligence, explaining 76% of shared variance.
- Significant correlations observed between verbal fluency and intelligence (0.36), and verbal fluency and spatial working memory (0.20).
- Sensorimotor gating and openness showed minimal genetic or environmental correlations with other studied endophenotypes.
Conclusions:
- Intelligence demonstrates substantial genetic overlap with a known schizophrenia cognitive endophenotype, positioning it as a promising marker for genetic research.
- Sensorimotor gating and openness appear to be genetically distinct, potentially aiding in the identification of separate genetic pathways contributing to schizophrenia.
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