I studied parts of the basal ganglia, part of the dopaminergic circuits of motor control. I'm not sure if it's a poorly written (news) article or the scientist was overstating his position - I don't know any neuroscientists who think dopamine is "sprayed" across the brain.

Edit: The paper is a breakthrough because it's reporting the first-ever direct imaging of dopamine signaling. But the news article mischaracterizes it.