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Seminar – Stéphanie Trouche

Friday 10 May 2019 / 11:30 - 12:30

A hippocampus-accumbens tripartite neuronal motif guides appetitive memory in space

Stéphanie Trouche
Stéphanie Trouche

Stéphanie Trouche
CR INSERM, IGF, Montpellier

Invited by Catherine Le Moine
Directeur de Recherche CNRS
INCIA / CNRS UMR 5287 Université de Bordeaux


Abstract

Animals must retrieve memories of food-predicting environments and direct their spatial behaviour to ensure their survival. In mammals, pyramidal cells of the dorsal hippocampus provide a map-like representation of space. How these representations influence the behavioural expression of spatial appetitive memory is still unknown. Our latest work addresses this question by monitoring and manipulating neuronal ensembles from the dorsal hippocampus and the nucleus accumbens in behaving mice. I will present recent evidence showing a functional dissociation between the neuronal reinstatement of a memory and its behavioural manifestation, often assumed to be the same process. We found that hippocampal representations of space are indeed necessary, but not sufficient, to act on appetitive memory retrieval. I will also present mechanistic evidence showing the importance of a tripartite neuronal motif in the dorsal hippocampus-accumbens pathway for successful place-reward behavior.

Selected publications

Trouche, S., Koren, V., Doig, N. M., Ellender, T. J., El-Gaby, M., Lopes-Dos-Santos, V., Reeve, H. M., Perestenko, P. V., Garas, F. N., Magill, P. J., Sharott, A., & Dupret, D. (2019). A Hippocampus-Accumbens Tripartite Neuronal Motif Guides Appetitive Memory in Space. Cell, 176, 1393-1406 e1316.

van de Ven, G. M., Trouche, S., McNamara, C. G., Allen, K., & Dupret, D. (2016). Hippocampal Offline Reactivation Consolidates Recently Formed Cell Assembly Patterns during Sharp Wave-Ripples. Neuron, 92, 968-974.

Trouche, S., Perestenko, P. V., van de Ven, G. M., Bratley, C. T., McNamara, C. G., Campo-Urriza, N., Black, S. L., Reijmers, L. G., & Dupret, D. (2016). Recoding a cocaine-place memory engram to a neutral engram in the hippocampus. Nat Neurosci, 19, 564-567.

Trouche, S., Sasaki, J. M., Tu, T., & Reijmers, L. G. (2013). Fear extinction causes target-specific remodeling of perisomatic inhibitory synapses. Neuron, 80, 1054-1065.

Trouche, S., Bontempi, B., Roullet, P., & Rampon, C. (2009). Recruitment of adult-generated neurons into functional hippocampal networks contributes to updating and strengthening of spatial memory. Proc Natl Acad Sci U S A, 106, 5919-5924.

 

Coming soon

  1. Monthly conference (PhD seminar series) – Laurent Bourdieu

    Friday 6 September 2019 / 11:30

    Fast 3D imaging of neuronal activity in visual cortex across multiple layers in awake mice

  2. Cajal lectures : Whole brain imaging

    Monday 9 September 2019 - Friday 27 September 2019

    Free entrance lectures / Venue: CGFB

  3. Seminar – Francesco Papaleo

    Friday 13 September 2019 / 11:30

    Bottom-Up and Top-Down Control of Emotion Recognition.

  4. LabEx TRAIL scientific day

    Monday 16 September 2019 / 14:00 - 18:00

    Dedicated to brain connectivity.

  5. Synapse Day

    Tuesday 17 September 2019

    Centre Broca Nouvelle-Aquitaine


Conférence internationale : REWARD

Du 2 au 4 octobre

L’événement en un coup d’oeil :
télécharger le livret (programme,
inscription, soumission d’abstract…)

brainconf.u-bordeaux.fr

Details

Date:
Friday 10 May 2019
Time:
11:30 - 12:30
Event Category: