Reduced anterior callosal white matter in risk for psychosis associated with processing speed as a fundamental cognitive impairment.
Schizophr Res
; 264: 211-219, 2024 Feb.
Article
en En
| MEDLINE
| ID: mdl-38157681
ABSTRACT
BACKGROUND:
Previous research in psychotic disorders discovered associations between reduced integrity of white matter (WM) in the corpus callosum (CC) and impaired cognitive functions, suggesting processing speed as a central construct. However, it is still largely unexplored to what extent disruption in callosal WM is related to cognitive deficits during the risk stage prior to psychosis.METHODS:
To address this gap, we measured the WM integrity in CC by fractional anisotropy (FA) and assessed cognition in 60 clinical-high risk for psychosis (CHR) patients during adolescence/young adulthood and 38 healthy control (HC) subjects. We employed tract based spatial statistics to examine group differences and associations between CC-FA and processing speed, executive function, and spatial working memory.RESULTS:
We revealed deficits in processing speed, executive function, and spatial working memory of CHR patients, and reductions in FA of the genu and the body of the CC (p < 0.05, corrected for multiple comparisons) compared to HC. A mediation analysis using the combined sample (CHR + HC) showed that processing speed mediates the associations between the impaired CC structure and executive function and spatial working memory, respectively. Exploratory analyses between CC-FA and the cognitive domains located associations of processing speed in the genu and the body of CC with distinct spatial distributions of executive function and spatial working memory.CONCLUSION:
We suggest processing speed as a subordinate cognitive factor contributing to the associations between callosal WM, executive function and working memory. These results extend findings in psychotic disorders to the prior risk stage.Palabras clave
Texto completo:
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Bases de datos:
MEDLINE
Asunto principal:
Trastornos Psicóticos
/
Disfunción Cognitiva
/
Sustancia Blanca
Límite:
Adolescent
/
Adult
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Humans
Idioma:
En
Revista:
Schizophr Res
Asunto de la revista:
PSIQUIATRIA
Año:
2024
Tipo del documento:
Article