Piano Practice a "Cure" for ADHD?

Here is an interesting article about research that shows that brain exercises may reduce ADD and ADHD symptoms in adults:

"Brain Games and Exercise: A Drug-Free Treatment for ADHD?"

It explores a controversial new book by Dr. Amnon Gimpel who suggests that activities in your everyday life can be turned into mental exercises. These exercises can in turn increase dopamine levels in the brain and, since ADHD symptoms may be caused by dopamine deficiency, may lessen the symptoms of adult ADHD.

The concept seems pretty simple when you look at it. If mental exercises increase brain cell growth, that would increase the amount of dopamine produced by the cells and therefore relieve the dopamine deficiency. Games such as chess, juggling, and sudoku are simple ways to exercise the brain in this way. I am sure, however, doing activities that require intense concentration such as piano would have the same effect. With piano, you cannot play without intense focus on reading the notes or trying to remember what notes to press next with your hands. I wouldn't be surprised if studying piano in youth or even as an adult would increase the ability to concentrate. From personal experience, during the times that I practice often I notice I have an increased ability to focus on other tasks such as reading, studying and finishing other work. But when I slack off and don't practice, my brain seems a tad more flustered and unable to just sit down, choose a task and complete it. Just food for thought...