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Probabilistic associative learning suffices for learning the temporal structure of multiple sequences
Stockholm University, Faculty of Science, Department of Mathematics. KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0002-2358-7815
Number of Authors: 32019 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 14, no 8, article id e0220161Article in journal (Refereed) Published
Abstract [en]

From memorizing a musical tune to navigating a well known route, many of our underlying behaviors have a strong temporal component. While the mechanisms behind the sequential nature of the underlying brain activity are likely multifarious and multi-scale, in this work we attempt to characterize to what degree some of this properties can be explained as a consequence of simple associative learning. To this end, we employ a parsimonious firing-rate attractor network equipped with the Hebbian-like Bayesian Confidence Propagating Neural Network (BCPNN) learning rule relying on synaptic traces with asymmetric temporal characteristics. The proposed network model is able to encode and reproduce temporal aspects of the input, and offers internal control of the recall dynamics by gain modulation. We provide an analytical characterisation of the relationship between the structure of the weight matrix, the dynamical network parameters and the temporal aspects of sequence recall. We also present a computational study of the performance of the system under the effects of noise for an extensive region of the parameter space. Finally, we show how the inclusion of modularity in our network structure facilitates the learning and recall of multiple overlapping sequences even in a noisy regime.

Place, publisher, year, edition, pages
2019. Vol. 14, no 8, article id e0220161
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:su:diva-175121DOI: 10.1371/journal.pone.0220161ISI: 000484987900031PubMedID: 31369571OAI: oai:DiVA.org:su-175121DiVA, id: diva2:1360888
Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2019-12-04Bibliographically approved

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