Does the Desire for Drugs Begin Outside Awareness? / US. National Institute of Drug Abuse, 29 January 2008
http://www.nida.nih.gov/newsroom/08/NR1-29.html
"NIDA Research Reveals Subconscious Signals Can Trigger Drug Craving Circuits
Using a brain imaging technology called functional magnetic resonance imaging (fMRI), scientists have discovered that cocaine-related images trigger the emotional centers of the brains of patients addicted to drug, even when the subjects are unaware they've seen anything."
Prelude to Passion: Limbic Activation by “Unseen” Drug and Sexual Cues
PLoS One, 30 January 2008
http://digbig.com/4wjaj
Anna Rose Childress et al