Just found this amazingly useful site: http://thebrain.mcgill.ca/flash/index_a.html, affiliated with the Canadian Institutes of Health Research’s Institute of Neurosciences, Mental Health and Addiction.
Got brain questions? They’ve got the answers, at beginner, intermediate, and advanced levels, with detailed graphics, guided tours, and more. If you’re a neuroscience geek like me, or if you just want to understand exactly what depression or anxiety does in your brain, here’s your source.