Phase sequences in balanced recurrent networks
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KeywordsPhase Sequence Connection Probability Sequential Firing Plasticity Rule Recurrent Probability
Electrophysiological recordings suggest that cortical circuits operate in a regime where the excitatory and inhibitory currents received by individual neurons are highly correlated in both time and stimulus selectivity. For such balanced input, neurons are activated by fluctuations in the input and tend to fire asynchronously and at irregular time intervals, a regime known as asynchronous irregular state.
In contrast to synfire chain models, the balanced recurrent network dramatically reduces the connection probability pff that is required for the propagation of activity (Figure 1B). Simulations reveal a range of parameters in which asynchronous irregular spiking coexists with reliable activation and propagation of synchronous waves.
Supported by BMBF grants no. 01GQ1001A and 01GQ1201.
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