Brains, Neurons & Molecules: A modern view of the circuitry of the mind

Imagine you wanted to understand how a computer works and all you could see was a keyboard, a mouse, a screen. You really would be kind of out of luck. You want to be able to open it up, crack it open, look at the wiring inside. And up until a little more than a century ago, nobody was able to do that with the brain. Nobody had had a glimpse of the brain’s wiring …

And this all changed in the late 19th century. Suddenly, new chemical stains for brain tissue were developed and they gave us our first glimpses at brain wiring. The computer was cracked open.

How to Look Inside the Brain | TED: Carl Schoonover