Rats show cure for addiction may lie in brain's chemistry / Guardian, 2 March 2007
http://www.guardian.co.uk/drugs/Story/0,,2024915,00.html
James Randerson
"· Treating defect may prevent dependency
· Researchers find 'brake' that regulates impulses
Some people are predisposed to drug addiction because of the way their brains operate, say researchers who studied rats dependent on cocaine. Their findings pinpoint a "hidden vulnerability" that make the rats more impulsive and more likely to become dependent on the drug."