I'm sorry but I disagree, I used to stutter really intense in front of my dad (who pressured me to speak normal the most), and on my own I was perfectly fluent. This to me means it's purely psychological. The brain scans are a result of the mindset, not the other way around. That's why I said 'potential cure' because while it may not be a cure for you, it is a cure for me, and many other people who have the same type of stutter