Substance addiction and the inherent differences in brain functions.

According to data published by NIDA (National Institutes of Drug Abuse) nearly 20 million Americans have undergone substance de-addiction therapy in 2010. What makes some people so susceptible to substance abuse while others are able to protect themselves?

A study of brain images of heroin addicts, conducted by Gold, Liu and colleagues, shows significant differences in brain activity even in resting state, without heroin use.