Chiedo scusa, l'incontro è fissato per lunedì prossimo 30 Marzo 2015, e non lunedì 19 Gennaio 2015 come erroneamente scritto in precedenza. Cordiali saluti, Giacomo Aletti
On Tue, Mar 24, 2015 at 10:18 AM, Giacomo Aletti giacomo.aletti@unimi.it wrote:
Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Giacomo Aletti
Nell'ambito dei Reading Group Seminars e del Seminario di Matematica Applicata, il giorno lunedì 19 Gennaio 2015, alle ore 14.30, nell'Aula C del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano,
"Testing spiking neural network cerebellar model in closed-loop: three neurorobotic paradigms" Alberto ANTONIETTI Neuroengineering and medical robotics lab., Politecnico di Milano,
ABSTRACT: The cerebellum is involved in a large number of different neural processes, especially in associative learning and in fine motor control. To develop a comprehensive theory of sensorimotor learning and control, it is crucial to determine the neural basis of coding and plasticity embedded into the cerebellar neural circuit and how they are translated into behavioral outcomes in learning paradigms. Learning has to be inferred from the interaction of an embodied system with its real environment, and the same cerebellar principles derived from cell physiology have to be able to drive a variety of tasks of different nature, calling for complex timing and movement patterns. We have coupled a realistic cerebellar spiking neural network with a real robot and challenged it in multiple diverse sensorimotor tasks. Adaptive motor control protocols with acquisition and extinction phases have been designed and tested, including an associative Pavlovian task (Eye blinking classical conditioning), a vestibulo-ocular task and a perturbed arm reaching task operating in closed-loop. A bidirectional long-term plasticity rule implemented at parallel fibers-Purkinje cell synapses modulated the output activity in the deep cerebellar nuclei. In all tasks, the neurorobot learned to adjust timing and gain of the motor responses by tuning its output discharge. It succeeded in reproducing how human biological systems acquire, extinguish and express knowledge of a noisy and changing world.
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Reading Group Seminars: The Reading Group Seminars (RGS) are organized within an open community of researchers interested in applying up to date mathematical modeling and data analysis approaches to the study of biological systems. The RGS take place at the Math. Department in Milan (via Saldini). Initiatives and updates are published on the website: http://rgs.mat.unimi.it/.
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Giacomo Aletti, Associate Professor
ADAMSS Centre (ex MIRIAM) Advanced Applied Mathematical and Statistical Sciences
Department of Mathematics (www.matematica.unimi.it) Via Saldini, 50 20133 Milano, Italy Tel: +39-02-503.16158 Fax:+39-02-503.16090 Cell: +39-340-9739142