Effect of Synchronous Incoming Spikes on Activity Pattern in A Network of Spiking Neurons.pdfVIP
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Effect of Synchronous Incoming Spikes on Activity Pattern in A Network of Spiking Neurons
Effect of Synchronous Incoming Spikes on Activity Pattern in A
Network of Spiking Neurons
Takaaki Aoki
Department of Physics, Graduate School of Science,
4
0 Kyoto University, Kyoto 606-8502, Japan
0
2
t Toshio Aoyagi
c
O Department of Applied Analysis and Complex Dynamical Systems,
5
2 Graduate School of Infomatics, Kyoto University, Kyoto 606-8501, Japan
] (Dated: February 9, 2008)
C
N Abstract
.
o
i Although recent neurophysiological experiments suggest that synchronous neural activity is in-
b
q- volved in some perceptual and cognitive processes, the functional role of such coherent neuronal
[
behavior is not well understood. As a first step in clarifying this role, we investigate how the tem-
1
v poral coherence of certain neuronal activity affects the activity pattern in a neural network. Using
9
2 a simple network of leaky integrate-and-fire neurons, we study the effects of synchronized incoming
0
0
1 spikes on the functioning of two mechanisms typically used in model neural systems, winner-take-
4
0 all competition and associative memory. We demonstrate that a pair of switches undergone by
/
o the incoming spikes, from asynchronous to synchronous and then back to asynchronous, triggers a
i
b
- transition of the network from one state to another state. In the case of associative memory, for
q
:
v example, this switching controls the timing of the next recalling, whereas the firing rate pattern in
i
X the asynchronous state prepares the network for the next retrieval pattern.
r
a
PACS
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