Every smoker knows well that it is very difficult to restrain your desire to light a cigarette you. In fact, only on a photo of someone who smokes is enough for those who want to quit smoking to abandon their good intentions and light up "only one", researchers have recently demonstrated

Nov. human brain scans conducted during smoking and 24 hours after quitting, indicating an increase in a certain type of brain activity when those who quit cigarette smoking to see pictures of people.

Brain area considered the issue seems to be the dorsal striatum, a region responsible for automatism, such as those that control cycling or cleaning teeth.