Publications by authors named "Rajkumar Ravichandran"

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Neurometabolic signatures of gastrointestinal symptoms in the insula of Crohn's disease patients: explorative findings from a 7T MRS study.
Marja-Lisa Berthold, Hanna Hartmann, Ezequiel Farrher, Markus Zimmermann, Julius Jaeger, Ravichandran Rajkumar

Front Hum Neurosci· December 2025

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Resilience or vulnerability? thalamic subdivision connectivity in trauma-exposed individuals: a 7 t resting-state fMRI study.
Nibal Khudeish, Rajkumar Ravichandran, Abdulrahman S Sawalma, Raghad Kiwan, Shukti Ramkiran

Transl Psychiatry· December 2025

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Shared neurobiological changes in individuals with Crohn's disease and major depressive disorder.
Hanna A Hartmann, Marja L Berthold, Shukti Ramkiran, Lukas Bündgens, Julius W Jaeger, Ravichandran Rajkumar

Commun Med (Lond)· September 2025

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7-Tesla ultra-high field MRI of the parahippocampal cortex reveals evidence of common neurobiological mechanisms of major depressive disorder and neurotic personality traits.
Dominik Nießen, Ravichandran Rajkumar, Dilsa Cemre Akkoc Altinok, Gereon Johannes Schnellbächer, Shukti Ramkiran

Transl Psychiatry· July 2025

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Structural alterations as a predictor of depression - a 7-Tesla MRI-based multidimensional approach.
Gereon J Schnellbächer, Ravichandran Rajkumar, Tanja Veselinović, Shukti Ramkiran, Jana Hagen

Mol Psychiatry· June 2025

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Phenomena of hypo- and hyperconnectivity in basal ganglia-thalamo-cortical circuits linked to major depression: a 7T fMRI study.
Jana Hagen, Shukti Ramkiran, Gereon J Schnellbächer, Ravichandran Rajkumar, Maria Collee

Mol Psychiatry· January 2025

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The interaction effect of high social support and resilience on functional connectivity using seed-based resting-state assessed by 7-Tesla ultra-high field MRI.
Nibal Khudeish, Shukti Ramkiran, Dominik Nießen, Dilsa Cemre Akkoc Altinok, Ravichandran Rajkumar

Front Psychiatry· May 2024

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EEG microstates show different features in focal epilepsy and psychogenic nonepileptic seizures.
Domantė Kučikienė, Ravichandran Rajkumar, Katharina Timpte, Jan Heckelmann, Irene Neuner

Epilepsia· April 2024

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How brain networks tic: Predicting tic severity through rs-fMRI dynamics in Tourette syndrome.
Shukti Ramkiran, Tanja Veselinović, Jürgen Dammers, Arnim Johannes Gaebler, Ravichandran Rajkumar

Hum Brain Mapp· August 2023

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Structural alterations of the insula in depression patients - A 7-Tesla-MRI study.
Gereon J Schnellbächer, Ravichandran Rajkumar, Tanja Veselinović, Shukti Ramkiran, Jana Hagen

Neuroimage Clin· December 2022

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Analysis of New Biomarkers for the Study of Schizophrenia Following a Radiomics Approach on MR and PET Imaging.
Alejandro Carrasco-Poves, Silvia Ruiz-Espana, Claudia Regio Brambilla, Irene Neuner, Ravichandran Rajkumar

Annu Int Conf IEEE Eng Med Biol Soc· July 2022

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Connectivity Patterns in the Core Resting-State Networks and Their Influence on Cognition.
Tanja Veselinović, Ravichandran Rajkumar, Laura Amort, Jessica Junger, Nadim Jon Shah

Brain Connect· May 2022

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mGluR and GABA receptor-specific parametric PET atlas construction-PET/MR data processing pipeline, validation, and application.
Nicolas Kaulen, Ravichandran Rajkumar, Cláudia Régio Brambilla, Jörg Mauler, Shukti Ramkiran

Hum Brain Mapp· May 2022

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Test-retest stability of spontaneous brain activity and functional connectivity in the core resting-state networks assessed with ultrahigh field 7-Tesla resting-state functional magnetic resonance imaging.
Hasan Sbaihat, Ravichandran Rajkumar, Shukti Ramkiran, Abed Al-Nasser Assi, Jörg Felder

Hum Brain Mapp· April 2022

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mGluR5 binding changes during a mismatch negativity task in a multimodal protocol with [C]ABP688 PET/MR-EEG.
Cláudia Régio Brambilla, Tanja Veselinović, Ravichandran Rajkumar, Jörg Mauler, Andreas Matusch

Transl Psychiatry· January 2022

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7T ultra-high-field neuroimaging for mental health: an emerging tool for precision psychiatry?
Irene Neuner, Tanja Veselinović, Shukti Ramkiran, Ravichandran Rajkumar, Gereon Johannes Schnellbaecher

Transl Psychiatry· January 2022

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Dynamics of task-induced modulation of spontaneous brain activity and functional connectivity in the triple resting-state networks assessed using the visual oddball paradigm.
Hasan Sbaihat, Ravichandran Rajkumar, Shukti Ramkiran, Abed Al-Nasser Assi, N Jon Shah

PLoS One· December 2021

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Comparison of EEG microstates with resting state fMRI and FDG-PET measures in the default mode network via simultaneously recorded trimodal (PET/MR/EEG) data.
Ravichandran Rajkumar, Ezequiel Farrher, Jörg Mauler, Praveen Sripad, Cláudia Régio Brambilla

Hum Brain Mapp· September 2021

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Common neurobiological correlates of resilience and personality traits within the triple resting-state brain networks assessed by 7-Tesla ultra-high field MRI.
Dilsa Cemre Akkoc Altinok, Ravichandran Rajkumar, Dominik Nießen, Hasan Sbaihat, Margo Kersey

Sci Rep· June 2021

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Excitatory-inhibitory balance within EEG microstates and resting-state fMRI networks: assessed via simultaneous trimodal PET-MR-EEG imaging.
Ravichandran Rajkumar, Cláudia Régio Brambilla, Tanja Veselinović, Joshua Bierbrier, Christine Wyss

Transl Psychiatry· January 2021

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mGluR5 receptor availability is associated with lower levels of negative symptoms and better cognition in male patients with chronic schizophrenia.
Cláudia Régio Brambilla, Tanja Veselinović, Ravichandran Rajkumar, Jörg Mauler, Linda Orth

Hum Brain Mapp· July 2020

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Corrigendum to "TRIMAGE: A dedicated trimodality (PET/MR/EEG) imaging tool for schizophrenia" [Eur Psychiatry 50 (2018) 7-20].
Alberto Del Guerra, Salleh Ahmad, Mihai Avram, Nicola Belcari, Arne Berneking, Ravichandran Rajkumar

Eur Psychiatry· June 2018

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TRIMAGE: A dedicated trimodality (PET/MR/EEG) imaging tool for schizophrenia.
Alberto Del Guerra, Salleh Ahmad, Mihai Avram, Nicola Belcari, Arne Berneking, Ravichandran Rajkumar

Eur Psychiatry· April 2018

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Simultaneous trimodal PET-MR-EEG imaging: Do EEG caps generate artefacts in PET images?
Ravichandran Rajkumar, Elena Rota Kops, Jörg Mauler, Lutz Tellmann, Christoph Lerche

PLoS One· October 2017

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