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1: Neural Comput. 2003 Jun;15(6):1321-40. Related Articles, Links
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On embedding synfire chains in a balanced network.

Aviel Y, Mehring C, Abeles M, Horn D.

Interdisciplinary Center for Neural Computation, Hebrew University, Jerusalem, Israel.

We investigate the formation of synfire waves in a balanced network of integrate-and-fire neurons. The synaptic connectivity of this network embodies synfire chains within a sparse random connectivity. This network can exhibit global oscillations but can also operate in an asynchronous activity mode. We analyze the correlations of two neurons in a pool as convenient indicators for the state of the network. We find, using different models, that these indicators depend on a scaling variable. Beyond a critical point, strong correlations and large network oscillations are obtained. We looked for the conditions under which a synfire wave could be propagated on top of an otherwise asynchronous state of the network. This condition was found to be highly restrictive, requiring a large number of neurons for its implementation in our network. The results are based on analytic derivations and simulations.

PMID: 12816575 [PubMed - indexed for MEDLINE]