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Looking at a small group of chronic marijuana smokers. compared to nonusers, their brains were smaller in the frontal cortex. are you paying attention? >> yeah. >> this is important information for you. the frontal cortex is the part that controls your decision-making. they also found the flow of traffic and other parts of the brain in those marijuana users is actually faster. how do you explain that? it means the brain may be trying to compensate for being a smaller brain and it's working a little faster. they don't know all the exact details. they don't know if the brain is smaller because o...

Give you a quick tip. just try getting more sleep. not only does it give you the emergency you need, but the will power to not reach for that bag of potato chips the next day. a new study finds less sleep means less activity in your frontal cortex. that's the part that helps you make decisions about what to eat. you don't get enough sleep r, don't have the good judgment to make wise food choices. i hope you will join us next month for the race and until then, stay healthy. [ male announcer ] this is betsy. her long day of pick ups and drop offs begins with arthritis pain... and a choice. take ...

Jamie: what is your vice? could be food, alcohol. i hope it is not drugs. but there may be a reason why bad habits are so hard to break. everybody's got one. one doctor actually revealing some new and interesting research on addiction, suggesting that it is driven by one simple brain function and it might help in the cure. dr. nora volkow explaining those findings on "60 minutes". >> there are certain areas of the brain that are directly implicated in our capacity to exert free will. the frontal cortex is one of them, crucial, crucial. if drugs damage the areas of the brain that we need in ord...

It lowers triglycerides and heart disease and reduces inflammation and with alzheimer's, the brain slows down and the plaque forms between the brain and the information from one side doesn't get to the other side and that is how -- exactly how the computer freezes and eat your fish once a week and you will be healthier. >> the fatty fishes are better, salmon and that type of fish has the most omega-3s and david is right about fried fish. other study have shown that it kills the omega-3s off and the baked fish and broiled fish, here's the thing, though, about the study. it is preliminary, for t...

This is your brain on pot. we've got texas researchers looking at a small group of chronic marijuana smokers. compared to nonusers, their brains were smaller in the frontal cortex. are you paying attention? >> yeah. >> this is important information for you. the frontal cortex is the part that controls your decision-making. they also found the flow of traffic and other parts of the brain in those marijuana users is actually faster. how do you explain that? it means the brain may be trying to compensate for being a smaller brain and it's working a little faster. they don't know all the exact det...