driving is so habitual that they shouldn't take these frontal lobes. isn't that what kind of assumption. when we need to slam on the break the brain isn't brain isn't able to react as quickly as we want. >> guest: make no mistake driving deaths are an epidemic we have absolved. this isn't a situation where people are doing some overtly negligent behavior drinking themselves into a coma taking a gun into the square this is good people driving to destinations they want to reach with good hearts dot hoping to hurt anybody in 30 to 40,000 people a year by eating and i would bring something appear statistically. one of the issue is that for a while for while the wireless industry brought up and they don't anymore is while driving fatalities have come down in the u.s.. that is true. but to whether things are true. they come down far less than other countries and they've come down at the time that we have spent billions on wide roads, air bags, safety measures in the car so it is what the public safety advocates would say is you would be seeing much better in

we can clearly say that people who use marijuana have a smaller frontal lobe, the decision making partf the brain. what's interesting is, there's more connection out of that area. and the more structural changes that happen the younger they start. but after six or seven years those structural changes go away. >> so did they already have a smaller frontal lobe or did the marijuana shrink their brain? >> key question. we just don't know. it took people by questionnaire who used marijuana versus those who did not, they looked at those. marijuana is a class one narcotic. it's difficult to do a study. that part needs to change so we can study it. >> you know, dr. david agus here in new york city, they just announce they had would no longer be arresting people caught with small amounts of marijuana. we just had an election where recreation marijuana became legal in certain states. do you think it could have an impact on public policy? >> no question. i feel like i should be holding up a bag of oregano when i answer this. but there's no question, a study like this, really puts into our heads

driving is so habitual that it should not be -- should not take the frontal lobe.sn't that one kind of assumption? >> guest: yes,. >> host: and you are saying that when we are tired or we face the situation where we must slam on the brakes the brain is not able to react as quickly as we want. >> guest: well, make no mistake, driving deaths are an epidemic that we have not solved. this is not a situation where people are doing some overly negligent behavior, you know, drinking themselves into a, you know, taking a gun into a square, this is good people driving to destinations that they want to reach with good hearts not hoping to hurt anybody and 30-40000 people per year dying. i would bring something appears statistically. one of the issues that for a while the wireless industry brought up, they do not anymore. driving fatalities have come down in the u.s. you know, that is true, but to other things are also true. they have come down far less than other countries, and they have come down at a time when we have spent billions on wider roads, air bags, lots of safety

. >> yeah, right up here, this is the frontal lobe of the brain, the more abuse that frontal lobe takesknow it's connected to chronic traumatic swelling of the brain that can lead to sense of temper and impatience and anger. of course, as we know across the board, there are mild mannered sigh c psychiatrists who are abusers. i spoke to a neurologist and he said look, you take a lot of abuse to the front of the head, it's not the sort of thing it's like a light switch that turns you to take part in intimate partner violence but it doesn't help. i interviewed a lot of women who are the wives and in some cases widows of nfl players who are connected with abuse and tell very similar stories about things like frustration, migraine headaches, the inability to remember things. things we associate with post concussion syndromes and that does not make you an abuser but it doesn't help. if i could say one thing, i want to give thanks to hill. he interviews jenae rice with ray rice by herself. the idea you put an abuser and survivor in the same room to beg for his job in front of his desk. he shou

alarming rates, such that by the end of the year some of these kids had no function in one of their frontal lobes. we need to take a step back right at this moment and remind ourselves that these are high-school students at the public high-school, taxpayer funded public high-school, and try to imagine what would happen in another context if there was, for instance, a gas leak in the cafeteria that was shown to be causing diminished brain function in high-school students, how quickly with the school be shut down with the media, lawyers, parents, school officials, federal officials because it is within the context of football, it is on the field, we saw popcorn , cheerleaders, heroic and in many ways a cohesive and. but the same thing is happening inside those helmets, and that is what i mean about the medical science catching up with football. when i say that football does not have a concussion problem, i think it has of violence problem and a physics and physiology problem. the physics will remain the same. the physiology is simple. the brain is a soft organa encased in a hard shell. when is jost

at alarming rates, such that by the end of the year, these kids had no function in one of their frontal lobes. we need to take a step back right at this moment and remind ourselves that these are high school students at a public high school, taxpayer-funded public high school and try to imagine what would happen in another context if there was for instance a gas leak in the cafeteria that was shown to be causing diminished brain function and high school students. how quickly without school be shut down? with the media lawyers, parents and school officials may be federal officials defend to shut it down? because this was in the context of football, we sell popcorn, their cheerleaders, it's heroic and did many ways a cohesive event for the community to organize around but the same thing is happening inside those helmets. that's what i mean about the medical science catching up with football. when i say that football doesn't have a concussion problem, i think it has a violence problem and it has the physics and physiology problem. the physics are going to remain the same. the physiology is very