Addiction: a loss of plasticity of the brain?

ScienceDaily (2010-06-24) -- Why is it that only some drug users become addicts?Researchers have just discovered that the transition to addiction could result from a persistent impairment of synaptic plasticity in a key structure of the brain.

Enlace:http://www.sciencedaily.com/releases/2010/06/100624140912.htm