Bifurcation of learning and structure formation in neuronal maps

Christian Marschler, Carmen Faust-Ellsässer, Jens Starke, J. Leo van Hemmen

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Abstract

Most learning processes in neuronal networks happen on a much longer time scale than that of the underlying neuronal dynamics. It is therefore useful to analyze slowly varying macroscopic order parameters to explore a network's learning ability. We study the synaptic learning process giving rise to map formation in the laminar nucleus of the barn owl's auditory system. Using equation-free methods, we perform a bifurcation analysis of spatio-temporal structure formation in the associated synaptic-weight matrix. This enables us to analyze learning as a bifurcation process and follow the unstable states as well. A simple time translation of the learning window function shifts the bifurcation point of structure formation and goes along with traveling waves in the map, without changing the animal's sound localization performance.
Original languageEnglish
Article number48005
JournalEPL
Volume108
Issue number4
Number of pages7
ISSN0295-5075
DOIs
Publication statusPublished - 2014

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