The human brain is a marvelous thing. It helps us learn and adapt. Central to these abilities is neuroplasticity, which allows our human brain to recognize itself as necessary even after traumatic brain injuries. Neurons, also known as the body's information superhighway, carry signals from the brain to our body. The neurons use Synapse a system by which signals are passed from an axon terminal to a dendrite, to transmit the signals. There are three types of signals; Motor, Sensory, and Interneuron. Neurons make up 10% of brain cells. The other 90% are Glia cells. The neurons are so tiny that 30,000 neurons can fit on the head of a pin. Another interesting fact is that men and women's brain feel pain differently. Plasticity allows for specific body or brain functionality as represented in the brain to move to a different region of the brain, if and when necessary. Post-injury, the brain regains functionality and leverages the uninjured parts.