Publications de Alexandre Cionca

Community detection for directed networks revisited using bimodularity

Dimitri Nestor Alice Van De Ville, Alexandre Cionca

Community structure is a key feature omnipresent in real-world network data. Plethora of methods have been proposed to reveal subsets of densely interconnected nodes using criteria such as the modularity index. These approaches have been successful for und ...

Proceedings of the National Academy of Sciences2025

Hilbert Transform on Graphs: Let There Be Phase

Dimitri Nestor Alice Van De Ville, Alexandre Cionca

In the past years, many signal processing operations have been successfully adapted to the graph setting. One elegant and effective approach is to exploit the eigendecomposition of a graph shift operator (GSO), such as the adjacency or Laplacian operator, ...

IEEE Institute of Electrical and Electronics Engineers2025

Cerebrospinal ceramides and cognition as a function of striatal asymmetry in early stage of Parkinson's disease

Alexandre Cionca

Background Parkinson's disease (PD) is characterized by heterogeneous clinical phenotypes that may be influenced by the asymmetry of striatal denervation. The alpha-Synuclein Origin site and Connectome (SOC) model proposes that different disease onset patt ...

SAGE PUBLICATIONS INC2025

Long Coronavirus Disease and the Brain: Molecular Neuroimaging Insights into Neurologic and Psychiatric Sequelae

Alexandre Cionca

To conclude, the neurologic impacts of COVID-19 represent a significant and emerging public health challenge. From acute conditions like strokes to persistent symptoms such as cognitive decline ,the effects of COVID-19 on the brain are diverse and complex. ...

ELSEVIER INC2024

Acute TNF alpha levels predict cognitive impairment 6-9 months after COVID-19 infection

Dimitri Nestor Alice Van De Ville, Alessandra Griffa, Alexandre Cionca, Idris Guessous

Background: A neurocognitive phenotype of post-COVID-19 infection has recently been described that is characterized by a lack of awareness of memory impairment (i.e., anosognosia), altered functional connectivity in the brain's default mode and limbic netw ...

PERGAMON-ELSEVIER SCIENCE LTD2023

Markers of limbic system damage following SARS-CoV-2 infection

Dimitri Nestor Alice Van De Ville, Alessandra Griffa, Alexandre Cionca, Idris Guessous

Alterations of the limbic system may be present in the chronic phase of SARS-CoV-2 infection. Our aim was to study the long-term impact of this disease on limbic system-related behaviour and its associated brain functional connectivity, according to the se ...

OXFORD UNIV PRESS2023

Acute TNF alpha levels predict cognitive impairment 6-9 months after COVID-19 infection (vol 153, 106104, 2023)

Dimitri Nestor Alice Van De Ville, Alessandra Griffa, Alexandre Cionca, Idris Guessous

PERGAMON-ELSEVIER SCIENCE LTD2023