Le Dr Frédéric CREVECOEUR (post-doctorant en ICTEAM & IoNS/COSY) présentera le 2 octobre un séminaire sur le rôle de la rétroaction sensorielle dans les commandes motrices.
Ce séminaire (invitation 
) se déroulera dans la salle de séminaire MARTIN V 42B, de 12h30 à 13h30 sur le campus de Louvain-en-Woluwe (UCL) et s'inscrit dans le cadre du cycle de séminaires 2015-2016 organisé par le pôle COSY.
ABSTRACT : Humans and animals perform complex motor actions with extreme precision, despite the presence of sensorimotor noise and temporal delays affecting sensory signals. In my research I use mathematical modelling in parallel with behavioural experiments and surface recordings to characterise how the nervous system processes sensory feedback and uses it to generate purposeful motor commands. I will put a particular emphasis on the problem of state estimation, which consists in estimating the present state of the limb in a broad sense (e.g. position, velocity and joint torques) following external perturbations. My recent work has shown that the nervous system rapidly correct the internal estimation of limb motion and uses this estimation to generate motor commands in ~50ms. A consequence of such rapid estimation is that, in the context of feedback control, the process of integrating information from multiple sensory modalities must consider differences in feedback delays across sensory systems. I will present evidence supporting this prediction. In summary, this presentation will highlight some of the components of neural feedback control, which, altogether, support the hypothesis that the nervous system has accurate knowledge of the physiological constraints associated with sensory systems. These results suggest that the brain has evolved sophisticated processing of sensory feedback to achieve optimal state estimation in both static and dynamic contexts.