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Publications associées (86)
Ukrainian Literary Imaginaries of Past after 1991: From Substitution to Restoration?
This chapter offers a new view of post-Soviet Ukrainain literary memory as expressed in varous texts, redefining the role of clashing narratives of the past under the divisive political and social conditions of upheavals, crises, and military conflicts. Th ...
Routledge2024Face your fears: attenuating remote fear memories by reconsolidation-updating
Johannes Gräff, Bianca Ambrogina Silva
Traumatic events generate some of the most enduring memories, yet little is known about how long-lasting fear memories can be attenuated. In this review, we collect the surprisingly sparse evidence on remote fear memory attenuation from both animal and hum ...
ELSEVIER SCIENCE LONDON2023Tissue clearing applications in memory engram research
Johannes Gräff, Kwok Yui Reymond Yip
A memory engram is thought to be the physical substrate of the memory trace within the brain, which is generally depicted as a neuronal ensemble activated by learning to fire together during encoding and retrieval. It has been postulated that engram cell e ...
FRONTIERS MEDIA SA2023A dynamic attractor network model of memory formation, reinforcement and forgetting
Wulfram Gerstner, Chiara Gastaldi, Marta Boscaglia
Empirical evidence shows that memories that are frequently revisited are easy to recall, and that familiar items involve larger hippocampal representations than less familiar ones. In line with these observations, here we develop a modelling approach to pr ...
San Francisco2023Brain-wide screen of prelimbic cortex inputs reveals a functional shift during early fear memory consolidation
Johannes Gräff, Lucie Pauline Dixsaut
Memory formation and storage rely on multiple interconnected brain areas, the contribution of which varies during memory consolidation. The medial prefrontal cortex, in particular the prelimbic cortex (PL), was traditionally found to be involved in remote ...
2022The resistance of stone: thick and fragmented urban collective memory in Gulou
In his seminal work, Halbwachs (1950: 132–139) already noted a homology between the resistance of stone and the resistance of cities’ inhabitants to being displaced or effaced. This contribution seeks to study the relationship between the built environment ...
2022Where does the engram come from? Study of prefrontal cortex inputs during memory consolidation
The formation and storage of memories has been under deep investigation for several decades. Nevertheless, the precise contribution of each brain region involved in this process and the interplay between them across memory consolidation is still largely de ...
EPFL2022Epigenetic memory aids: Synaptic and molecular effects of HDAC inhibition that support memory formation
Learning and memory rely on synaptic communication in which intracellular signals are transported to the nucleus to stimulate transcriptional activation. Memory induced transcriptional increases are accompanied by alterations to the epigenetic landscape an ...
EPFL2022The HDAC inhibitor CI-994 acts as a molecular memory aid by facilitating synaptic and intracellular communication after learning
Johannes Gräff, Allison Marie Burns, Jose Vicente Sanchez Mut, Giulia Santoni
Long-term memory formation relies on synaptic plasticity, neuronal activity-dependent gene transcription, and epigenetic modifications. Multiple studies have shown that HDAC inhibitor (HDACi) treatments can enhance individual aspects of these processes and ...
2022Mechanical reinforcement and memory effect of strain-induced soft segment crystals in thermoplastic polyurethane-urea elastomers
Nicolas Candau, Oguzhan Oguz, Adrien Julien Demongeot
An amorphous poly(urethane-urea) copolymer composed of 70 wt% poly(ethylene oxide) (PEO) soft segments (SS) (Mw = 2000 g mol−1) and 30 wt% cycloaliphatic hard segments (HS) was subjected to in-situ X-Rays during tensile deformation. Mechanical hardening at ...
2021