Smoking - is it all in your head

If you're having trouble kicking the habit ( and what smoker doesn't find it tough to do) consider this - a new study finds the higher order functions of your brain wants to stop buy the lower order screams, light up again!
Duke University researchers studied brain scans and found 3 regions deep within the brain that appear to control your dependence on cigarettes. They say, this explains why it takes a couple of attempts to be successful.
So what does this mean. The researchers hope it can lead to more targeted drug therapies to help you stop smoking.
Interesting footnote: the research was funded by Phillip Morrris USA.
http://www.nature.com/npp/index.html