I've had a stint of it. When I'm stressed or over-tired it can reappear.
"NAcc dopamine" got 43000 results on Google. aka nucleus accumbens. Plenty on good old wikipedia.
http://en.wikipedia.org/wiki/Restless_legs_syndrome
http://en.wikipedia.org/wiki/Dopamine
http://en.wikipedia.org/wiki/Nucleus_accumbens
