Computational neuroscience is a field of science that combines mathematics and computer science with neuroscience—the study of how the brain works. Scientists in this field use math and computer programs to study how different parts of the brain work together, like how neurons (brain cells) communicate with each other. They use this information to understand how the brain processes information and give us things like memories, conscious awareness, and even emotions. Computational neuroscience helps us learn more about how the brain works so that we can understand diseases like Alzheimer's and help people with mental health issues.