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Ophélie Gladys Favrod

Cette personne a quitté l’EPFL

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Publications associées (25)

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Electrophysiological correlates of visual backward masking in the schizophrenia continuum

Ophélie Gladys Favrod

In visual backward masking (VBM), a target is followed by a mask. Over the past decade, a VBM task, called the Shine-Through paradigm (ST), has been shown to be a very sensitive endophenotype of schizophrenia. In the present thesis, the electrophysiologica ...

EPFL2019

Electrophysiological correlates of visual backward masking in patients with major depressive disorder

Michael Herzog, Maya Roinishvili, Patricia Figueiredo, Ophélie Gladys Favrod, Janir Nuno Ramos Antunes Da Cruz

Depression and schizophrenia are two psychiatric diseases with high co-morbidity. For this reason, it is important to find sensitive endophenotypes, which may disentangle the two disorders. The Shine-Through paradigm, a visual backward masking task, is a p ...

2019

The EEG multiverse of schizophrenia

Michael Herzog, Maya Roinishvili, Patricia Figueiredo, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod, Wei-Hsiang Lin, Dario Alejandro Gordillo Lopez

Research on schizophrenia typically focuses on one paradigm for which clear-cut differences between patients and controls are established. Great efforts are made to understand the underlying genetical, neurophysiological, and cognitive mechanisms, which ev ...

2023

Electroencephalogram (EEG) Frontal Asymmetry and Error-Related Signals Are Potential Markers of Internalizing and Externalizing Behaviors in Children: A Meta-Analysis

Michael Herzog, Ophélie Gladys Favrod

Objectives: The frontal hemispheric asymmetry and error-related components, as measured by EEG, are often considered to be biological correlates or “indicators of risk” for psychopathology. Here, we performed a meta-analysis to define specific patterns of ...

2017

Neural dynamics of the competition between grouping organizations

Michael Herzog, Ophélie Gladys Favrod, Einat Rashal

Neural dynamics of the competition between grouping organizations have been studied to a limited extent. The paradigms used so far confounded grouping operations with task demands, using explicit reports of the predominantly perceived organization and bias ...

SAGE PUBLICATIONS LTD2019

Endophenotypes of schizophrenia: electrophysiological correlates of first episode patients

Michael Herzog, Maya Roinishvili, Albulena Jashari-Shaqiri, Ophélie Gladys Favrod

Schizophrenia is a heterogeneous disorder and among other symptoms, patients have important visual impairments. Visual paradigms are therefore important tools to investigate the mechanisms of schizophrenia. During the last period of the NCCR, we have chara ...

2015

EEG Correlates of Backward Masking in Schizotypy

Michael Herzog, Maya Roinishvili, Christine Mohr, Ophélie Gladys Favrod

Visual deficits are well documented in schizophrenia, especially in backward masking. In our task a Vernier is followed by a blank inter-stimulus interval (ISI) and then a grating mask. Observers indicate the direction of the Vernier offset (left vs right) ...

2016

Visual masking and schizophrenia: enhancement deficit 200 ms after stimulus onset

Michael Herzog, Maya Roinishvili, Ophélie Gladys Favrod, Janir Nuno Ramos Antunes Da Cruz

Masking is strongly deteriorated in schizophrenia patients and to a lesser extent in their healthy relatives. For this reason, masking is a good endophenotype. Here, we show the EEG correlates of masking across the schizophrenia continuum in order to tackl ...

2018

Risk prediction error signaling: A two-component response?

Michael Herzog, Kerstin Preuschoff, Ophélie Gladys Favrod, Marc Michael Lauffs

Organisms use rewards to navigate and adapt to (uncertain) environments. Error-based learning about rewards issupported by the dopaminergic system, which is thought to signal reward prediction errors to make adjustmentsto past predictions. More recently, t ...

2020

EEG microstates are a candidate endophenotype for schizophrenia

Michael Herzog, Maya Roinishvili, Christine Mohr, Patricia Figueiredo, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod

Electroencephalogram microstates are recurrent scalp potential configurations that remain stable for around 90 ms. The dynamics of two of the four canonical classes of microstates, commonly labeled as C and D, have been suggested as a potential endophenoty ...

Nature Research2020

The shine-through paradigm and the schizophrenia spectrum: a summary

Michael Herzog, Maya Roinishvili, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod, Simona Adele Garobbio

In the past 10 years, our laboratory has proved the shine-through paradigm to be a very sensitive endophenotype for schizophrenia. The shine-through paradigm is a visual backward masking task, where the target is a vertical vernier followed by a 25-element ...

2021

Contour-integration deficits in intact visual field of hemianopia patients

Michael Herzog, Ophélie Gladys Favrod

We investigated Gestalt perception in the intact visual field (VF) of hemianopia patients. Three patients and matched controls performed a Yes-No figure detection task. Gabor patches of one orientation, making up the outline of a square, were embedded in r ...

Sage Publications Ltd2015

Electrophysiological correlates of visual backward masking in first-episode psychosis

Michael Herzog, Maya Roinishvili, Albulena Jashari-Shaqiri, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod

Schizophrenia is a heterogeneous disorder and among other symptoms, patients have important visual impairments. Visual paradigms are therefore important tools to investigate the mechanisms of schizophrenia. We have previously shown that visual backward mas ...

2017

Neural correlates of visual backward masking in psychosis

Michael Herzog, Maya Roinishvili, Christine Mohr, Albulena Jashari-Shaqiri, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod

In visual backward masking (VBM), a target is followed by a mask, which deteriorates performance on the target. Schizophrenia and first episodes patients show strong behavioral deficits, reflected in strongly reduced amplitudes of the EEG as compared to co ...

2017

Electrophysiological correlates of visual backward masking in patients with bipolar disorder

Michael Herzog, Maya Roinishvili, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod, Simona Adele Garobbio

In visual backward masking (VBM), a target is followed by a mask that decreases target discriminability. Schizophrenia patients (SZ) show strong and reproducible masking impairments, which are associated with reduced EEG amplitudes. Patients with bipolar d ...

2021

Pathological completion in the intact visual field of hemianopia patients

Michael Herzog, Ophélie Gladys Favrod

Taylor & Francis2017

Electrophysiological correlates of visual backward masking in high schizotypic personality traits participants

Michael Herzog, Maya Roinishvili, Christine Mohr, Ophélie Gladys Favrod

Visual backward masking is strongly deteriorated in patients with schizophrenia. Masking deficits are associated with strongly reduced amplitudes of the global field power in the EEG. Healthy participants who scored high in cognitive disorganization (a sch ...

Elsevier2017

Neural Compensation Mechanisms of Siblings of Schizophrenia Patients as Revealed by High-Density EEG

Michael Herzog, Maya Roinishvili, Patricia Figueiredo, Albulena Jashari-Shaqiri, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod

Visual backward masking (VBM) deficits are candidate endophenotypes of schizophrenia indexing genetic liability of the disorder. In VBM, a target is followed by a mask that deteriorates target perception. Schizophrenia patients and, to a lesser extent, the ...

2020

Embedded figures in schizophrenia: A main deficit but no specificity

Michael Herzog, Maya Roinishvili, Ophélie Gladys Favrod, Michel Akselrod

Visual deficits are core deficits of schizophrenia. Classically, deficits are determined with demanding psychophysical tasks requiring fine-grained spatial or temporal resolution. Less is known about holistic processing. Here, we employed the Leuven Embedd ...

2022

Visual backward masking and the schizophrenia spectrum: EEG correlates

Michael Herzog, Maya Roinishvili, Albulena Jashari-Shaqiri, Janir Nuno Ramos Antunes Da Cruz, Ophélie Gladys Favrod

Schizophrenia is a heterogeneous disease strongly influenced by genetic factors. We have previously shown that visual backward masking (VBM) is a very sensitive endophenotype of schizophrenia (Chkonia et al., 2010). Importantly, not only patients but also ...

2017