Dynamic aspects of delay activity

The population density equation (PDE) has generated considerable interest, recently. The PDE allows e.cient simulation of populations with a large number of neurons. We apply the PDE to an existing model of delay activity, which produces stationary 1ring rates for delay assemblies. In order to observe transient phenomena, we apply the PDE to this model. Here we present the preliminary results. We 1nd that a novel algorithm to solve the PDE is instrumental for this particular application. Our results agree with stationary rates that can be found using a di5usion approximation. c © 2002 Elsevier Science B.V. All rights reserved.