IISER Pune
INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH (IISER) PUNE
where tomorrow’s science begins today
An Autonomous Institution, Ministry of Human Resource Development, Govt. of India
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Seminars and Colloquia

Biology

A learning scheme for neural networks in the brain to predict and control body movement 
 
Fri, Aug 11, 2017,   04:00 PM to 05:00 PM at Seminar Room 34, 2nd Floor, Main Building

Aditya Gilra, Ph.D.
EPFL, Lausanne (Wulfram Gerstner Lab)

Abstract:
To plan and control movement, the brain must construct a model of the non-linear dynamics of the body in response to neuro-muscular commands. How a network of spiking neurons (in the brain) can learn such a model, by adjusting interconnection weights in a biologically plausible way, is still unresolved. As an advance in this direction, we propose a local and stable learning scheme, Feedback-based Online Local Learning Of Weights (FOLLOW) [Gilra and Gerstner, arXiv:1702.06463]. We show that the learning scheme is uniformly stable with the error going to zero asymptotically, under reasonable approximations. We apply the FOLLOW scheme to enable a network of interconnected spiking neurons to learn the dynamics of a linear, non-linear or chaotic example system. We also make the network learn the dynamics of a simplified two-link arm, then use the network to control the arm, to draw a desired shape on a wall. Ongoing extensions will also be discussed.

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