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• W2787945422 startingPage "169" @default.
• W2787945422 abstract "Psychotic experiences (PEs) are considered part of an extended psychosis phenotype and are associated with an elevated risk of developing a psychotic disorder. Risk of transition increases with persistence of PEs, and this is thought to be modulated by genetic and environmental factors. However, it is unclear if persistence is associated with progressive schizophrenia-like changes in neuroanatomy.We examined cortical morphometry using MRI in 247 young adults, from a population-based cohort, assessed for the presence of PEs at ages 18 and 20. We then incorporated a polygenic risk score for schizophrenia (PRS) to elucidate the effects of high genetic risk. Finally, we used atlas-based tractography data to examine the underlying white matter.Individuals with persisting PEs showed reductions in gyrification (local gyrification index: lGI) in the left temporal gyrus as well as atypical associations with brain volume (TBV) in the left occipital and right prefrontal gyri. No main effect was found for the PRS, but interaction effects with PEs were identified in the orbitofrontal, parietal, and temporal regions. Examination of underlying white matter did not provide strong evidence of further disturbances.Disturbances in lGI were similar to schizophrenia but findings were mostly limited to those with persistent PEs. These could reflect subtle changes that worsen with impending psychosis or reflect an early vulnerability associated with the persistence of PEs. The lack of clear differences in underlying white matter suggests our findings reflect early disturbances in cortical expansion rather than progressive changes in brain structure." @default.
• W2787945422 created "2018-03-06" @default.
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• W2787945422 creator A5056610146 @default.
• W2787945422 creator A5062534720 @default.
• W2787945422 date "2018-01-29" @default.
• W2787945422 modified "2023-09-24" @default.
• W2787945422 title "MRI Indices of Cortical Development in Young People With Psychotic Experiences: Influence of Genetic Risk and Persistence of Symptoms" @default.
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• W2787945422 doi "https://doi.org/10.1093/schbul/sbx195" @default.
• W2787945422 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6293214" @default.
• W2787945422 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29385604" @default.
• W2787945422 hasPublicationYear "2018" @default.
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