The signals, in the form of electrical impulses, travel down the length of the nerve cell. With the help of special chemicals they travel from cell to cell, creating connections. Repeated activation of neuron networks strengthens these connections. These connections are miracles of the human body. A single cell can connect with as many as 15,000 other cells.
Experience shapes the way circuits are made in the brain.
From birth, the brain is rapidly creating these connections. A baby's brain is super-dense and will stay that way throughout the first 10 years of life. The resulting circuitry is more powerful and efficient. The brain knows which connections to keep When a connection is used repeatedly in the early years, it becomes permanent. A connection that is not used at all, or often enough, is unlikely to survive.