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Propagation of cortical synfire activity: survival probability in single trials and stability in the mean.
Gewaltig MO, Diesmann M, Aertsen A.
Future
Technology Research, Honda R&D Europe (Deutschland) GmbH,
Offenbach/Main, Germany. marc-oliver.gewaltig@hre-ftr.f.rd.honda.co.jp
The
synfire hypothesis states that under appropriate conditions volleys of
synchronized spikes (pulse packets) can propagate through the cortical
network by traveling along chains of groups of cortical neurons. Here,
we present results from network simulations, taking full account of the
variability in pulse packet realizations. We repeatedly stimulated a
synfire chain of model neurons and estimated activity (a) and temporal
jitter (sigma) of the spike response for each neuron group in the chain
in many trials. The survival probability of the activity was assessed
for each point in (a, sigma)-space. The results confirm and extend our
earlier predictions based on single neuron properties and a
deterministic state-space analysis [Diesmann, M., Gewaltig, M.-O.,
& Aertsen, A. (1999). Stable propagation of synchronous spiking in
cortical neural networks. Nature, 402, 529-533].
Publication Types:
PMID: 11665761 [PubMed - indexed for MEDLINE]
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