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. 2015 Jan 29;8:175. doi: 10.3389/fncom.2014.00175

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Copyright © 2015 Esposito, Giugliano and Vasilaki.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Single population scenario: STP parameters distribution during adaptation with (U, τ_rec) learning scheme (Part 2). Different phases of the dynamics are represented. (A) Initial (uniformly random) condition. (B) End of low 1 phase (target rate is 5 Hz). (C) End of high 1 phase (30 Hz). (D) End of low 2 phase (5 Hz). (E) End of high 2 phase (30 Hz). Columns 1, 2 Histograms of recovery time constant and synaptic utilization of the synapses projecting onto the output neurons. Low values indicates facilitation whereas high values suggest depression. Column 3 Single synapse traces obtained with the TM model by applying a 5 Hz stimulus. Synaptic parameters used are mean values obtained from the distributions drawn in (A,B). Synapses display a clear alternation between depressing and facilitating behavior.