This is your brain on drugs, and it doesn't involve a frying egg. Scientists said Tuesday that repeated pot smoking can leave two neural regions that are key to emotions and motivation misshapen or abnormally large. “When we saw that there was a consistent abnormality and that it was directly related to the amount of cannabis one took in, it gave us some significant pause,” the study's co-author said. “Seeing these differences raises a cautionary flag that we need to do more research.”
