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Séminaire - Julien VitayNeuro-computational models of subcortical structures involved in goal-directed behavior

Abstract :


 Processing in the cerebral cortex is shaped by the interaction of many subcortical structures,
among which the basal ganglia, the amygdala and the hippocampus. Although these structures are classically associated with specific functions (reinforcement learning, fear conditioning or long-term memory encoding), their interplay form the basis of complex behaviors such as the formation, valuation and obtention of goals.

The dopaminergic system plays a central role in coordinating the activity and plasticity of these structures. In this talk, I will present different neuro-computational models investigating the role of dopamine and subcortical structures in different aspects of goal-directed behavior, including visual memory encoding and retrieval, delayed rewarded tasks, working memory, goal-directed navigation and timing mechanisms.

Selected publications

•Vitay, J., Dinkelbach. HÜ. and Hamker, FH. (2015). "ANNarchy: a code generation approach to neural simulations on parallel hardware", Frontiers in Neuroinformatics 9(19). doi:10.3389/fninf.2015. 00019.

• Vitay, J. and Hamker, FH. (2014). "Timing and expectation of reward: a neuro-computational model of the afferents to the ventral tegmental area", Frontiers in Neurorobotics 8(4). doi:10.3389/fnbot. 2014.00004

• Schroll, H., Vitay, J. and Hamker, FH. (2014). "Dysfunctional and Compensatory Synaptic Plasticity in Parkinson’s Disease", European Journal of Neuroscience 39(4), pages 688-702. doi:10.1111/ejn. 12434.

• Dinkelbach, HÜ., Vitay, J., Beuth, F. and Hamker, FH. (2012). "Comparison of GPU- and CPU- implementations of mean-firing rate neural networks on parallel hardware", Network: Computation in Neural Systems, 23(4), pages 212-236. doi:10.3109/0954898X.2012.739292