Schizophrenia patients and 22q11.2 deletion syndrome adolescents at risk express the same deviant patterns of resting state EEG microstates: A candidate endophenotype of schizophrenia

Publication date: Available online 27 May 2015 Source:Schizophrenia Research: Cognition Author(s): Miralena I. Tomescu , Tonia A. Rihs , Maya Roinishvili , F. Isik Karahanoglu , Maude Schneider , Sarah Menghetti , Dimitri Van De Ville , Andreas Brand , Eka Chkonia , Stephan Eliez , Michael H. Herzog , Christoph M. Michel , Céline Cappe Schizophrenia is a complex psychiatric disorder and many of the factors contributing to its pathogenesis are poorly understood. In addition, identifying reliable neurophysiological markers would improve diagnosis and early identification of this disease. The 22q11.2 deletion syndrome (22q11DS) is one major risk factor for schizophrenia. Here, we show further evidence that deviant temporal dynamics of EEG microstates are a potential neurophysiological marker by showing that the resting state patterns of 22q11DS are similar to those found in schizophrenia patients. The EEG microstates are recurrent topographic distributions of the ongoing scalp potential fields with temporal stability of around 80ms that are mapping the fast reconfiguration of resting state networks. Five minutes of high-density EEG recordings was analysed from 27 adult chronic schizophrenia patients, 27 adult controls, 30 adolescents with 22q11DS, and 28 adolescent controls. In both patient groups we found increased class C, but decreased class D presence and high transition probabilities towards the class C microstates. Moreover, these aberrant temporal dynami...
Source: Schizophrenia Research: Cognition - Category: Psychiatry Source Type: research