Here is a website where you can find scientific proof that:
a. inflammation has a negative effect on dopamine levels
b. the most common RLS remedies have a positive effect on dopamine levels
c. the most common RLS antagonists (msg, sugar, gluten etc.) have a negative effect on dopamine levels
http://www.rlcure.com/dopamine.html
You can find out similar scientific evidence about RLS and the nervous system here: http://www.rlcure.com/nervoussystem.html
This page features some natural dopamine agonists that you can check out:
http://www.rlcure.com/naturaldopamine.html