Building the Roads in the City of Your Brain

Your brain is the control center of your body; every movement, thought, and feeling that you have starts in your brain. But how does the brain do this? The work in the brain is done by neurons, a type of cell that looks like a tree with lots of branches going in all directions (look at the left side of Figure 1 to see what a neuron looks like). Thoughts and actions happen when different neurons “talk” to each other. In fact, there are neurons...