One of the final frontiers of science is the human brain. The brain is the source of our intelligence, feelings and ability to make our bodies move – as well as the locus of terrible diseases such as Parkinson’s and Alzheimer’s – and is as complicated as any object that scientists explore. Parkinson’s disease, which experts say affects more than six million people around the world, can progressively degrade many of those functions, a primary reason why a team of researchers has been given a grant to delve ever more deeply into the circuitry and function of the striatum.