This is indeed exactly the reason why I came to head-fi in the first place. The dopamine mentioned in the article is not just a "feel-good" chemical, which I guess people associate it with most because of the "runner's high", but it has a key function as a so-called neurotransmitter, or messenger between brain cells. Brain cells don't physically touch, so for signals to cross the small gap between them, the cells send these messengers out. A bit like two people standing at a distance throwing balls with letters on them. With enough balls those letters can form a message. However, in ADHD (which I have) the levels of a number of neurotransmitters is suspected to be lower than usual, which you might be able to sense can give problems with concentration (the attention deficit) because the signal is not strong enough (sort of like there are not enough balls to make the complete message).
Music allows me to elevate the levels of dopamine (among others) and actually helps me improve my concentration. It is quite challenging to use effectively though because, like the article hints at, it has to work with our emotions to be most effective and our emotions change constantly. So sometimes I feel I need classical music in the background, while at other times I write difficult academic pieces with Device blaring in my ears. I have also found that change works well, not just in terms of music, but in terms of the gear I use. A new signature is exciting, the new toy syndrome we all know so well, but that actually strengthens the physiological response and so I constantly rotate between different gear to maximise the benefits (a key reason why I review).
Sorry for being all science-nerdy, but I love this stuff.
