Hippocampal volume in subjects at high risk of psychosis: a longitudinal MRI study

Walter, Anna and Studerus, Erich and Smieskova, Renata and Kuster, Pascal and Aston, Jacqueline and Lang, Undine E. and Radue, Ernst-Wilhelm and Riecher-Rössler, Anita and Borgwardt, Stefan. (2012) Hippocampal volume in subjects at high risk of psychosis: a longitudinal MRI study. Schizophrenia Research, 142 (1-3). pp. 217-222.

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Official URL: https://edoc.unibas.ch/67149/

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The hippocampal formation has been studied extensively in schizophrenic psychoses and alterations in hippocampal anatomy have been consistently reported. Chronic schizophrenia seems to be associated with bilateral hippocampal volume (HV) reduction, while in patients with an at-risk mental state (ARMS) there are contradictory results. This is the first region of interest (ROI) based follow-up MRI study of hippocampal volume comparing ARMS individuals with and without transition to psychosis. The aim was to investigate the timing of HV changes in ARMS in the early phase of psychosis. METHODS: Magnetic resonance imaging data from 18 antipsychotic-naive individuals with an ARMS were collected within the FePsy-clinic for early detection of psychoses. During follow-up 8 subjects transitioned to psychosis (ARMS-T) and 10 did not (ARMS-NT). Subjects were re-scanned after the onset of psychosis or at the end of the follow-up if they did not develop psychosis. RESULTS: Across both groups there was a significant decrease in HV over time (p<0.05). There was no significant difference in progression between ARMS-T and ARMS-NT. Antipsychotic medication at follow up was associated with increased HV (p<0.05). CONCLUSIONS: We found a decrease of HV over time in subjects with an ARMS, independently of clinical outcome. We may speculate that the decrease of HV over time might reflect brain degeneration processes.
Faculties and Departments:03 Faculty of Medicine > Bereich Psychiatrie (Klinik) > Erwachsenenpsychiatrie UPK > Erwachsenenpsychiatrie (Riecher-Rössler)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Psychiatrie (Klinik) > Erwachsenenpsychiatrie UPK > Erwachsenenpsychiatrie (Riecher-Rössler)
UniBasel Contributors:Riecher-Rössler, Anita and Studerus, Erich
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:29 Mar 2019 15:01
Deposited On:29 Mar 2019 14:58

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