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Role of GABAergic interneurons in the formation of new memory traces in the Dentate Gyrus ofbehaving mice

Total Cost €


EC-Contrib. €






 IN-Fo-trace-DG project word cloud

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cell    intensive    unknown    plasticity    memories    born    time    brain    question    neuronal    granule    imaging    traces    interference    made    cells    gyrus    area    inhibition    association    group    cellular    despite    temporal    dentate    fundamental    organisms    largely    dg    fo    examine    dependent    excitatory    constraints    associations    emerge    ins    ones    visualize    space    first    principal    acquisition    little    tools    gabaergic    trace    individual    recruitment    spatial    mechanisms    adapt    mature    learning    modifications    progress    form    adult    population    innovative    vivo    interconnectivity    populations    synapses    signals    discrete    suggest    photon    output    difficult    inhibitory    structure    environment    disciplinary    neurons    networks    differently    changing    patterns    recordings    gcs    optogenetic    molecular    virtual    assembly    excitation    processed    memory    theories    interneurons    cortical    balance    analyze    insights   

Project "IN-Fo-trace-DG" data sheet

The following table provides information about the project.


Organization address
postcode: 79106
website: n.a.

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 Germany [DE]
 Total cost 2˙463˙693 €
 EC max contribution 2˙463˙693 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2017-ADG
 Funding Scheme ERC-ADG
 Starting year 2018
 Duration (year-month-day) from 2018-10-01   to  2023-09-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Despite intensive study in the past on the problem of how information is processed in the brain to enable individual organisms to adapt to their continuously changing environment, little progress has been made on how new similar but discrete memory traces emerge in neuronal networks during learning. Current theories suggest that experience-dependent modifications in excitation-inhibition balance enable a selected group of neurons to form a new cell association during learning which represent the new memory trace. It was further proposed that particularly GABAergic inhibitory interneurons (INs) have a large impact on population activity in neuronal networks by means of their inhibitory output synapses. However, how cell associations emerge in space and time and how INs may contribute to this process is still largely unknown. This complex topic was so far difficult to address due to technical constraints. IN-Fo-Trace-DG aims to address this fundamental question in the dentate gyrus (DG), a brain structure essential for the acquisition of similar but discrete new memories. Based on our detailed knowledge on DG’s cellular elements, their interconnectivity and our recently established molecular interference tools, we will first, visualize the spatial and temporal activity patterns of cell populations during spatial learning in a virtual-reality using 2-Photon imaging. Second, we will determine the role of IN recruitment and plasticity in assembly formation by optogenetic and molecular interference. Third, we will analyze changes in excitatory and inhibitory signals in granule cells (GCs), the principal cells in this brain area, and INs during learning using whole-cell recordings in vivo. Finally, we will examine whether adult-born GCs contribute differently to learning-associated population activity compared to mature ones in the adult DG. This innovative multi-disciplinary approach will provide new insights on the mechanisms of new memory formation in cortical networks.

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