Your brain, an amazing, powerful organ, enables you to think, learn, create and feel emotions, controlling every blink, breath and heartbeat. Faster than any computer, the brain stores memories while you sleep. Protected by the skull, the brain's neurons (nerve cells) send electrochemical messages to the body via the nervous system. We learn about the cerebrum, cerebra, brain stem, hemispheres, gyre indents, dendrites, axons, sensory neurons, motor neurons, neuroscience, strokes, and how to keep your brain healthy.