Drug addicts have inherited abnormalities in some parts of the brain which interfere with impulse control, said a British study published in the United States on Thursday.
Previous research has pointed to these differences, but it was unclear if they resulted from the ravages of addiction or if they were there beforehand to predispose a person to drug abuse.
Scientists at the University of Cambridge compared the brains of addicts to their non-addicted siblings as well as to healthy, unrelated volunteers and found that the siblings shared many of the same weaknesses in their brains.
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