Dynamics of pruning in simulated large-scale spiking neural networks

Details

Serval ID
serval:BIB_8D1986E916D8
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Dynamics of pruning in simulated large-scale spiking neural networks
Journal
Biosystems
Author(s)
Iglesias J., Eriksson J., Grize F., Tomassini M., Villa A.
ISSN
0303-2647
Publication state
Published
Issued date
2005
Peer-reviewed
Oui
Volume
79
Number
1-3
Pages
11 - 20
Language
english
Abstract
Massive synaptic pruning following over-growth is a general feature of mammalian brain maturation. This article studies the synaptic pruning that occurs in large networks of simulated spiking neurons in the absence of specific input patterns of activity. The evolution of connections between neurons were governed by an original bioinspired spike-timing-dependent synaptic plasticity (STDP) modification rule which included a slow decay term. The network reached a steady state with a bimodal distribution of the synaptic weights that were either incremented to the maximum value or decremented to the lowest value. After 1 X 10(6) time steps the final number of synapses that remained active was below 10% of the number of initially active synapses independently of network size. The synaptic modification rule did not introduce spurious biases in the geometrical distribution of the remaining active projections. The results show that, under certain conditions, the model is capable of generating spontaneously emergent cell assemblies.
Keywords
Locally connected random network, Spike-timing-dependent synaptic plasticity, Spiking neural network, Large-scale simulation
Web of science
Create date
10/10/2008 14:45
Last modification date
20/08/2019 14:51
Usage data