Objectif Optogenetics provides a powerful tool with which to not only observe but also manipulate neuronal activity, due to the possibility it provides to spatially and temporally target subpopulations of neurons. Recently, the first reports have emerged of the co-expression of excitatory and silencing opsins within the same neuron population, providing the opportunity to control the balance of excitation and inhibition within neural circuits. However, this approach is currently limited by interactions between co-expressed opsins, which are suggested to be nonlinear. Correspondingly, this nonlinearity complicates the proposal of stimulation protocols for modulating neural activity. Thus although optogenetics progresses towards the use of co-activated opsins to modulate neural activity, the mechanisms underlying their interaction have not been studied. In this project, I propose to address the functional implications of this deficit by studying the co-activation of excitatory and silencing opsins from the level of single neurons, to their dual activation in networks. I will do this by combining two parallel approaches. Firstly, I will use experimental in vitro and in vivo models to study the effects of co-activated opsins in isolated neurons and networks respectively. Secondly, based on an underlying biophysical model of opsins, I will examine computer models of co-activated opsins in single cells and in a multiscale model of a cortical circuit. By combining findings from experimental and theoretical models, I will increase our understanding of the possibilities of co-activated opsins, whilst simultaneously providing suitable experimental and theoretical models with which to further explore the balance of excitation and inhibition in cortical networks. This research will be of great immediate benefit to optogenetics, and help define the future direction of this technique as an effective tool with which to study the role of excitation and inhibition within neural circuits. Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) FP7-PEOPLE-2013-IEF - Marie-Curie Action: "Intra-European fellowships for career development" Appel à propositions FP7-PEOPLE-2013-IEF Voir d’autres projets de cet appel Régime de financement MC-IEF - Intra-European Fellowships (IEF) Coordinateur IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE Contribution de l’UE € 221 606,40 Adresse SOUTH KENSINGTON CAMPUS EXHIBITION ROAD SW7 2AZ LONDON Royaume-Uni Voir sur la carte Région London Inner London — West Westminster Type d’activité Higher or Secondary Education Establishments Contact administratif Shaun Power (Mr.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée
