The brain is a complicated beast, that operates (generally) by electrical activity. During development, all cells originate from the a single "cell": the zygote.
At some point during development, the cells will begin to form into the specialised cells of the brain. But how does the brain activity start?
Is there some process that gets things going, akin to jump starting a car? Specifically, I'm referring to the mammalian (and more specifically human) brain.