Neuroscience is the scientific study of the nervous system. It combines multiple fields of study such as such as mathematics, linguistics, engineering, computer science, chemistry, philosophy, psychology, and medicine, and helps us understand the correlation between brain and body and how diseases affect them. Neuroscientist helps us get a better understanding of conditions like Autism, Down Syndrome Parkinson’s disease, Schizophrenia, Stroke, etc. They find a way to prevent or treat and also techniques for rehabilitation. There are different branches of Neuroscience, each one studying an effect of a thought, action, role of protein and genes, catalyst, developmental factors and growth, parts of brain responsible for certain functions covering anatomical, chemical and electrical aspects of it.

The rise of Artificial Intelligence and Neuroscience seems to mutually assist each other. Neuroscience helped to, emulate human intelligence, and to build neural networks that mimic brain structure. Machine Learning has the capability of recognizing pattern in complex data. It is assisting Scientist to learn the how the billions of neurons work together.
We can maintain good brain health by eating right (diet inclusive of Omega-3 fatty acids), exercise, being social, sleeping well and avoiding habit forming unhealthy activities like smoking, alcohol consumption. Repetition strengthens the neuron pathways and helps form habits. Practice activities like listening to music, quality time with family, catch some sunlight, exercise, meditate and laugh loud to generate Happy Hormones in your body.
My References
https://www.medicalnewstoday.com/articles/248680#becoming-a-neuroscientist
https://towardsdatascience.com/the-fascinating-relationship-between-ai-and-neuroscience-89189218bb05