A negative comment about fMRI brain scans; Don't believe they tell us as much as the science press hype tries to display:

http://online.wsj.com/article/SB10001424052970204554204577024253508340744.html?KEYWORDS...

Here is a useful application of brain scans. As an aside I am one of the lucky ones. I don't do depression, I am in excellent health, taking no meds at 82 years old, and I don't feel much pain. Two kidney stones so far passed without pain pills, most cuts don't hurt, and almost all of several surgeries without post-operative analgesia. But most folk are not like me. These interventions based on scans are useful:

http://online.wsj.com/article/SB10001424052970204323904577038041207168300.html?KEYWORDS...