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    Université de Fribourg

    Disruption of gamma–delta relationship related to working memory deficits in first-episode psychosis

    Missonnier, Pascal ; Prévot, Anne ; Herrmann, François R. ; Ventura, Joseph ; Padée, Anna ; Merlo, Marco C. G.

    In: Journal of Neural Transmission, 2020, vol. 127, no. 1, p. 103–115

    Working memory (WM) deficits constitute a core symptom of schizophrenia. Inadequacy of WM maintenance in schizophrenia has been reported to reflect abnormalities in the excitation/inhibition (E/I) balance between pyramidal neurons and parvalbumin basket cells, which may explain alterations of the dynamics of gamma and delta oscillations. To address this issue, we assessed event-related gamma...

    Université de Fribourg

    Differences of temporal dynamics and signal complexity of gamma band oscillations in first-episode psychosis during a working memory task

    Missonnier, Pascal ; Curtis, Logos ; Ventura, Joseph ; Herrmann, François R. ; Merlo, Marco C. G.

    In: Journal of Neural Transmission, 2017, vol. 124, no. 7, p. 853–862

    Gamma band oscillations participate in the temporal binding needed to synchronize cortical networks, involved in early sensory and short term memory processes. In earlier studies, alterations of these neurophysiological parameters have been found in psychotic disorders. To date no study has explored the temporal dynamics and signal complexity of gamma band oscillations in first episode psychosis...

    Université de Fribourg

    Differences in social decision-making between proposers and responders during the ultimatum game: an eeg study

    Horat, Sibylle K. ; Prévot, Anne ; Richiardi, Jonas ; Herrmann, François R. ; Favre, Grégoire ; Merlo, Marco C. G. ; Missonnier, Pascal

    In: Frontiers in Integrative Neuroscience, 2017, vol. 11, p. -

    The Ultimatum Game (UG) is a typical paradigm to investigate social decision-making. Although the behavior of humans in this task is already well established, the underlying brain processes remain poorly understood. Previous investigations using event-related potentials (ERPs) revealed three major components related to cognitive processes in participants engaged in the responder condition, the...