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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.

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

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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