  During embryonic morpho-genesis, a collection of individual neurons turns
into a functioning network with unique capabilities. Only recently has this
most staggering example of emergent process in the natural world, began to be
studied. Here we propose a navigational strategy for neurites growth cones,
based on sophisticated chemical signaling. We further propose that the
embryonic environment (the neurons and the glia cells) acts as an excitable
media in which concentric and spiral chemical waves are formed. Together with
the navigation strategy, the chemical waves provide a mechanism for
communication, regulation, and control required for the adaptive self-wiring of
neurons.
