Substance addiction and the inherent differences in brain functions

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.