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DTSTART;TZID=Europe/Madrid:20230111T120000
DTEND;TZID=Europe/Madrid:20230111T130000
DTSTAMP:20260430T164147
CREATED:20230109T085957Z
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UID:103479-1673438400-1673442000@ibecbarcelona.eu
SUMMARY:IBEC Seminar: Manuel Valero
DESCRIPTION:The role of inhibition in hippocampal coding\nManuel Valero\, PhD NYU Neuroscience Institute\, New York University (US) \nThe fundamental computation a single neuron performs is to integrate incoming excitatory and inhibitory inputs to decide whether to fire an action potential and feedback its activity into the network. Investigation of this synaptic computation requires access to the neuron subthreshold dynamics\, whose state-of-art methodologies have remained unaltered for decades and are unrealistic for cell assemblies and behaving animals.\nInstead of intracellular recording\, we propose a method to optogenetically probe the membrane polarization of the cells with short depolarizing pulses using chronically implanted µLED probes (4 shanks with 3 µLED/shank). Light-sensitive neurons responded to one or more µLEDs and the spike numbers were used as a proxy for estimating relative changes in the membrane potential dynamics. Strikingly\, induced spike responses gain sharply increased several-folds inside the preferred position (place fields) of the responsive cells. These results are compatible with a tuning curve model in the CA1 pyramidal cells where excitation and inhibition display a concerted and reciprocal relationship. When optogenetic stimulation was probed on non-place cells\, majority of the putative non-place cells showed place-related activity. Finally\, we optically probed neurons around sharp wave-ripples (SPW-Rs)\, hippocampal events considered a key mechanism for memory consolidation and action planning. In the short time window of SPW-R\, excitatory and inhibitory neurons increased in parallel. As expected\, optogenetic probing of the CA1 networks showed that\, in contrast to the large gain within place fields\, responsivity of pyramidal cells showed a robust decrease during SPW-Rs.\nWe have developed a method for studying the subthreshold dynamics of individual cells in chronic recordings using novel high-resolution optical stimulation as a proxy for membrane polarization. These experiments disclosed a reciprocal interaction between inhibition and excitation along the place fields of CA1 and demonstrated that the same exact perturbation can bring about opposite responses during exploration and transient SPW-Rs. \n\n  \n 
URL:https://ibecbarcelona.eu/ca/event/ibec-seminar-manuel-valero/
LOCATION:Sala Dolors Aleu\, Cluster II\, IBEC\, Baldiri i Reixac\, Barcelona
CATEGORIES:IBEC Seminar
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DTSTART;TZID=Europe/Madrid:20230120T100000
DTEND;TZID=Europe/Madrid:20230120T120000
DTSTAMP:20260430T164147
CREATED:20230109T095712Z
LAST-MODIFIED:20230109T095712Z
UID:103484-1674208800-1674216000@ibecbarcelona.eu
SUMMARY:IBEC Seminar (online): Sam Hall
DESCRIPTION:Presentation of Open Research Europe publishing plataform\nSam Hall\, from Open Research Euorpe \nOpen Research Europe is the European Commission’s open access publishing platform for research stemming from Horizon 2020 and Horizon Europe funding. In this webinar Senior Content Acquisition Editor Sam Hall will show how the platform enables the rapid dissemination of results and facilitates open and constructive research discussion\, and maximizes the discoverability and credit for researchers and their work. Sam will also explain the funder-pays model which means that all publication fees are met by the European Commission at no cost to the researcher or the project. \n\nSam Hall is a Senior Content Acquisition Editor for F1000\, commissioning articles and Collections for Open Research Europe. Launched in March 2021\, Open Research Europe is an open access publishing Platform for research stemming from Horizon 2020\, Horizon Europe and/or Euratom funding across all subject areas. Within this broad remit\, Sam focusses on the research area of Engineering and Technology\, and most recently the Data Note article type. Sam has almost 10 years of experience working in publishing\, and in this time has worked in contrasting companies and settings. This has included society publishers\, start-ups\, and international governmental organizations. \nLink Teams here
URL:https://ibecbarcelona.eu/ca/event/ibec-seminar-online-sam-hall/
LOCATION:Online
CATEGORIES:IBEC Seminar
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