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Grega Repovš

6 papers in the library · 907 citations · publishing 2012-2025

Papers

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Ketamine Alters Tuning of Neural and Behavioral Spatial Working Memory Precision

bioRxiv Preprint Server February 10, 2025 Masih Rahmati, Flora Moujaes, Nina Purg Suljič et al. 1 citation preprint

Deficits in working memory (WM) are a hallmark of neuropsy-chiatric disorders such as schizophrenia, yet their neurobiological basis remains poorly understood. Glutamate N-methyl-D-aspartate receptors (NMDARs) are critical for spatial WM (sWM), with NMDAR antagonist ketamine known to attenuate task-evoked activation and reduce sWM accuracy. Cortical microcircuit models hypothesize that NMDAR...

Ketamine induces multiple individually distinct whole-brain functional connectivity signatures.

Elife April 17, 2024 Flora Moujaes, Jie Lisa Ji, Masih Rahmati et al. 23 citations

Ketamine has emerged as one of the most promising therapies for treatment-resistant depression. However, inter-individual variability in response to ketamine is still not well understood and it is unclear how ketamine's molecular mechanisms connect to its neural and behavioral effects. We conducted a single-blind placebo-controlled study, with participants blinded to their treatment condition....

What is it like to do a visuo-spatial working memory task: A qualitative phenomenological study of the visual span task.

Consciousness and Cognition February 1, 2024 Aleš Oblak, Oskar Dragan, Anka Slana Ozimič et al. 8 citations

Working memory is typically measured with specifically designed psychological tasks. When evaluating the validity of working memory tasks, we commonly focus on the reliability of the outcome measurements. Only rarely do we focus on how participants experience these tasks. Accounting for lived experience of working memory task may help us better understand variability in working memory...

Psilocybin Induces Time-Dependent Changes in Global Functional Connectivity

Biological Psychiatry January 13, 2020 Katrin H. Preller, Patricia Duerler, Joshua B. Burt et al. 199 citations

BackgroundThe use of psilocybin in scientific and experimental clinical contexts has triggered renewed interest in the mechanism of action of psychedelics. However, its time-dependent systems-level neurobiology remains sparsely investigated in humans.MethodsWe conducted a double-blind, randomized, counterbalanced, crossover study comprising 23 healthy human participants who received placebo and...

Changes in global and thalamic brain connectivity in LSD-induced altered states of consciousness are attributable to the 5-HT2A receptor

Elife October 25, 2018 Katrin H. Preller, Joshua B. Burt, Jie Lisa Ji et al. 416 citations

Background: Lysergic acid diethylamide (LSD) has agonist activity at various serotonin (5-HT) and dopamine receptors. Despite the therapeutic and scientific interest in LSD, specific receptor contributions to its neurobiological effects remain unknown. Methods: We therefore conducted a double-blind, randomized, counterbalanced, cross-over studyduring which 24 healthy human participants received...

NMDA receptor function in large-scale anticorrelated neural systems with implications for cognition and schizophrenia

Proceedings of the National Academy of Sciences September 25, 2012 Alan Anticevic, Mark G. Gancsos, John D. Murray et al. 260 citations

Glutamatergic neurotransmission mediated by N-methyl-d-aspartate (NMDA) receptors is vital for the cortical computations underlying cognition and might be disrupted in severe neuropsychiatric illnesses such as schizophrenia. Studies on this topic have been limited to processes in local circuits; however, cognition involves large-scale brain systems with multiple interacting regions. A prominent...