Christian Valt

Magnetoencephalographic Microstates Reveal Disrupted Brain Activity Patterns in Schizophrenia Controlling for Treatment-Related Modulations

Angelantonio Tavella, Christian Valt, Cristina Berchio, Giuseppe Stolfa et autres

BACKGROUND AND HYPOTHESIS: Electroencephalographic (EEG) or magnetoencephalographic (MEG) microstates, ie, discrete spatial configurations of brain signals over time, are thought to reflect the activity of large-scale brain circuits. Altered EEG microstates associated with cognitive control and attention have been consistently reported in …

it, us (code pays fourni par la source)

Different abnormalities of mismatch negativity in schizophrenia and depression as assessed with magnetoencephalography

Ileana Andriola, Christian Valt, Verdiana Marsella, Angelantonio Tavella et autres

Mismatch negativity (MMN) is widely considered a candidate diagnostic biomarker for schizophrenia (SCZ). Although blunted MMN responses have been reliably observed in psychosis, the evidence for MMN deficits in other disorders, such as major depressive disorder (MDD), is mixed. This study explores …

it, us (code pays fourni par la source)

Abnormal inter-hemispheric effective connectivity from left to right auditory regions during Mismatch Negativity (MMN) tasks in psychosis

Christian Valt, Fran López‐Caballero, Angelantonio Tavella, Mario Altamura et autres

• Blunted MMN in psychosis is linked to reduced connectivity between auditory regions. • Communication from left to right auditory regions is the most significant deficit. • This deficit might reflect a dysconnection between sensory/perceptual regions. • Deviance detection relies on beta, …

it, us (code pays fourni par la source)

MEG Microstates: An Investigation of Underlying Brain Sources and Potential Neurophysiological Processes

Christian Valt, Angelantonio Tavella, Cristina Berchio, Dylan Seebold et autres

Abstract Microstates are transient scalp configurations of brain activity measured by electroencephalography (EEG). The application of microstate analysis in magnetoencephalography (MEG) data remains challenging. In one MEG dataset ( N = 113), we aimed to identify MEG microstates at rest, explore their …

it, us (code pays fourni par la source)

Auditory mismatch negativity in pre-manifest and manifest Huntington’s disease

Marianna D. Delussi, Christian Valt, Adelchi Silvestri, Katia Ricci et autres

AIM: The aim of this study was to investigate the characteristics of the electrophysiological brain response elicited in a passive acoustic oddball paradigm, i.e. mismatch negativity (MMN), in patients with Huntington's disease (HD) in the premanifest (pHD) and manifest (mHD) phases. In …

it, us (code pays fourni par la source)

MEG microstates: an investigation of underlying brain sources and potential neurophysiological processes

Christian Valt, Angelantonio Tavella, Cristina Berchio, Leonardo Sportelli et autres

it, us (code pays fourni par la source)

Reduction of anxiety symptoms during systemic family therapy results in a concurrent improvement of cognitive performance: a study on people with high anxiety

Delila Lisica, Maida Koso-Drljević, Birgit Stürmer, Christian Valt

Difficulties in various cognitive functions are common observations in people experiencing anxiety. However, limited research has investigated the effects of psychotherapy on abnormal cognitive functioning. This study assessed whether psychotherapy-related reductions of anxiety result in improvements of cognitive functioning as well. Fifty-four …

ba, de, it (code pays fourni par la source)

Reduced magnetic mismatch negativity: a shared deficit in psychosis and related risk

Christian Valt, Tiziana Quarto, Angelantonio Tavella, Fabiola Romanelli et autres

BACKGROUND: Abnormal auditory processing of deviant stimuli, as reflected by mismatch negativity (MMN), is often reported in schizophrenia (SCZ). At present, it is still under debate whether this dysfunctional response is specific to the full-blown SCZ diagnosis or rather a marker of …

it, gb (code pays fourni par la source)

Working memory impairment in relation to the severity of anxiety symptoms

Delila Lisica, Maida Koso-Drljević, Birgit Stürmer, Amela Džubur et autres

A working memory (WM) deficit is a reliable observation in people experiencing anxiety. Whether the level of anxiety is related to the severity of WM difficulties is still an open question. In the present experiment, we investigated this aspect by testing the …

ba, de, it (code pays fourni par la source)

The Processing of Visual Signals in Major Depressive Disorder

Christian Valt, Dorothea Huber, Sofia Kontaxi, Joachim W. Frank et autres

The balanced processing of the internal mental world and the external world is a crucial aspect of everyday well-being. An extensive control of the internal emotional and cognitive world that often results in an internal expression of distress is a common feature …

de (code pays fourni par la source)

On the processing of optimal performances: Studying arousal evoked by being correct and fast

Christian Valt, Birgit Stürmer

INTRODUCTION: Responses are optimal when they are accurate and fast. The present experiment investigated whether optimal responses evoke physiological arousal and whether performance affects the processing and evaluation of subsequent emotional material. METHODS: Participants performed a response-choice task, where feedback was a …

de (code pays fourni par la source)

Reduced Phase Synchronization for Auditory Deviant Detection in Schizophrenia and Clinical High Risk for Psychosis

Christian Valt, Tiziana Quarto, Angelantonio Tavella, Leonardo Fazio et autres

it, gb, us (code pays fourni par la source)