[Forum SIS] Seminario ANTONIETTI (RGS & Matematica Applicata)

[Giacomo Aletti]

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Cordialmente,
Giacomo Aletti

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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