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BrownianReactivation SIGNED

Neural stochasticity and criticality in memory replay

Total Cost €

0

EC-Contrib. €

0

Partnership

0

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 BrownianReactivation project word cloud

Explore the words cloud of the BrownianReactivation project. It provides you a very rough idea of what is the project "BrownianReactivation" about.

poised    stochasticity    central    memories    transformation    input    mathematical    consolidation    question    emergence    stable    name    criticality    fact    moment    representations    behavioural    starting    trained    coherent    activation    data    memory    reorganization    learning    switch    explore    takes    portions    propagation    quantitative    intend    performance    mechanism    generalize    stored    newly    instead    assemblies    cortex    undergo    complete    recorded    semantic    episodic    avalanches    coincides    event    almost    induce    theory    random    transitions    hippocampal    critical    hippocampus    cell    fundamental    hierarchical    samplings    constant    hypothesis    manner    network    formed    characterizing    maximal    correlation    experiences    played    reconstruct    brain    contribution    collective    statistical    closeness    interaction    complement    consistent    core    explaining    combining    nature    phenomenon    dynamics    neural    circuits    statistics    cortical    integrate   

Project "BrownianReactivation" data sheet

The following table provides information about the project.

Coordinator
STICHTING KATHOLIEKE UNIVERSITEIT 

Organization address
address: GEERT GROOTEPLEIN NOORD 9
city: NIJMEGEN
postcode: 6525 EZ
website: www.radboudumc.nl

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Netherlands [NL]
 Total cost 175˙572 €
 EC max contribution 175˙572 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2018
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2019
 Duration (year-month-day) from 2019-11-01   to  2021-10-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    STICHTING KATHOLIEKE UNIVERSITEIT NL (NIJMEGEN) coordinator 175˙572.00

Map

 Project objective

Memories are not stored in a stable manner in the brain. Instead they undergo an almost constant process of transformation and reorganization from the very moment of their formation. This phenomenon, going under the name of memory consolidation is also at the core of fundamental changes in the nature of the information carried by the neural representations. In fact, the switch from hippocampal-based short-term memories to cortex-based long-term memories also coincides with the transitions from episodic to semantic memories. In this proposal, we aim at investigating the role played in memory consolidation by stochasticity and criticality of neural dynamics. We will develop a quantitative approach to this question by combining statistical analysis of newly recorded data, with mathematical modelling of the cortical-hippocampal interaction. Our hypothesis takes the emergence of long-range correlation as the central mechanism characterizing semantic memory formation. We propose that cortical neural circuits poised at criticality can exploit activity avalanches associated with this state to induce the collective activation of large portions of the brain necessary to reconstruct the complete input statistics. Using a hierarchical neural network trained with an input of random samplings of the episodic representations stored in the hippocampus, we will explore the interaction between the performance of the network and its closeness to a critical state. We will complement this work with an analysis of the presence of criticality in the cortical cell assemblies formed after learning a complex behavioural task. We expect these cell assemblies to show maximal contribution to the propagation of neural avalanches and to present consistent coordination with the hippocampal activity. We intend to integrate these results in a coherent theory of long-term memory formation, explaining the ability to generalize starting from event-based experiences.

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The information about "BROWNIANREACTIVATION" are provided by the European Opendata Portal: CORDIS opendata.

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