A team of researchers says it has solved the longstanding puzzle of why a key protein linked to learning is also needed to become addicted to cocaine. Results of the study describe how the learning-related protein works with other proteins to forge new pathways in the brain in response to a drug-induced rush of the “pleasure” molecule dopamine. By adding important detail to the process of addiction, the researchers say the work may point the way to new treatments.

Source: New insight into how brain 'learns' cocaine addiction