Is there some combination of settings that will keep the simulation from dieing out? Or is there some rule for signals propagate that requires them to "move" across the graph and not return?
I think an important thing to point out (besides the obvious fact that this is more beautiful visualization than it is simulation) that helps put our brain into perspective is that while this clearly seems very complex, it's only ~7000 neurons; the human brain has nearly _100 billion_. And that's not counting the glial cells, which may or may not be involved with signaling too.