K
Karel Frasch
Researcher at University of Ulm
Publications - 65
Citations - 1266
Karel Frasch is an academic researcher from University of Ulm. The author has contributed to research in topics: Schizophrenia & Schizoaffective disorder. The author has an hindex of 14, co-authored 57 publications receiving 1087 citations.
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Journal ArticleDOI
Dysconnectivity of multiple resting-state networks in patients with schizophrenia who have persistent auditory verbal hallucinations
Nadine D. Wolf,Fabio Sambataro,Nenad Vasic,Karel Frasch,Markus Schmid,Carlos Schönfeldt-Lecuona,Philipp A. Thomann,Robert Christian Wolf +7 more
TL;DR: The findings indicate that disrupted intrinsic connectivity of a speech-related network could underlie persistent AVHs in patients with schizophrenia, and the occurrence of hallucinatory symptoms seems to modulate RSNs associated with attention and executive control.
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Altered reward functions in patients on atypical antipsychotic medication in line with the revised dopamine hypothesis of schizophrenia
TL;DR: The findings partially support the current concept of dopaminergic dysfunction in schizophrenia, suggesting a rather hyperactive mesolimbic dopamine system and reduced prefrontal activation, at least in partially remitted patients treated with atypical antipsychotics.
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Temporally anticorrelated brain networks during working memory performance reveal aberrant prefrontal and hippocampal connectivity in patients with schizophrenia.
Robert Christian Wolf,Nenad Vasic,Fabio Sambataro,Annett Höse,Karel Frasch,Markus Schmid,Henrik Walter +6 more
TL;DR: Analysis of functional magnetic resonance imaging, a verbal working memory task and multivariate statistical techniques suggest that within two temporally anticorrelated network states, patients with schizophrenia exhibit increased and persistent dorsolateral prefrontal and hippocampal connectivity during WM performance.
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Volumetric abnormalities associated with cognitive deficits in patients with schizophrenia
TL;DR: The results indicate that regional abnormalities in brain structure may offer an account for some impaired cognitive domains in patients with schizophrenia, while other cognitive domains may remain relatively less affected by volumetric alterations.
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Schizoaffective disorder–an ongoing challenge for psychiatric nosology
TL;DR: In this paper, an overview of diagnostic reliability, symptomatology, outcome, neurobiology and treatment of schizoaffective disorder is provided, where common neurobiological factors were found across the traditional diagnostic categories.