Fig. 4.
Influence of delay and synaptic strength on O–E-induced gamma synchrony. (A) (Left) Color histograms of gamma phase difference of two modules for distinct values of GOE between modules (expressed as percent of GOE within a module). (Right) Values for the corresponding phase lock index (PLI). (B) Gamma synchrony induced by O–E synapses between two modules persists with delay values compatible with the anatomy. (Left) Color histograms of gamma phase difference between two modules are plotted for distinct delay times (GOE between modules = 60% of GOE within). (Right) Values for the corresponding PLI. Note the tendency of antiphase for delay times near half gamma period. For all these simulations, each module was composed of one E, five O, and five I cells. Other parameters values are the same as in Fig. 3.