we have been finding on psychopathic offenders they have an 18% reduction in the volume in the amygdala. when they contemplate making moral decisions like should i kill someone or not, that part of the brain is just not as active as in normal people. >> you have done a terrific job making the science accessible for people. i want to show a couple of images that will be important. you should read the book. take a look there at a scan of the brain, a p.e.t. scan. normal on the left and a murderer on the right. what are we looking at there? >> we are looking down on the brain. this is a p.e.t. scan looking at brain functioning. the red and yellow indicate high glucose metabolism or high brain functioning. on the left there with the normal control you can see there is a lot of good functioning in the very frontal region of the brain. see right at the top there -- >> the orange, yellow area. >> right at the top. that's good frontal lobe functioning. look on the right. the murderer, a distinct lack of activation in the very frontal region of the brain. >> that's an area of the brain often ass

we find a subversive, the amygdala kicks in, and it makes you want to run and scream. like the 20th time you heard that brittany -- britney spears song. >> you talked about going from a more intuitive style to more analytical, conscious. was that intuitive on its own? could you flesh that out a little bit? >> i think that was a bit of necessity. i was asked to put together a collection of my transcriptions in 1990. it was the first time that i had to sit down and transcribe all my music. until then, i had done it in my head. i learned things so fundamental that i did not know i was doing. sometimes i did not realize that there were extra beats, i would change the meter for two bars. in that process, i learned a lot. also, of teaching. when you start to teach, you have to think about what you're doing so you can explain it to somebody else in a meaningful way. i think it was that process of having to write and transcribe music that made me aware that you can analyze something, to benefit, but one needs to be careful that the analytical side does not wipe out the initial

whiskey naked never keep them together in my cerebellum is 20 percent smaller and my fear center the amygdala was larger than normal that would explain why i had so much anxiety terrible terrible anxiety from puberty that is now controlled with antidepressant medication. a lot of people are super anxious once again that turned me on a 2006 at the university of pittsburgh found i have a great big huge visual tract that would explain my visual thinking then i had scribbled fluid in the cortex that trashed out multitasking. [laughter] i cannot remember long sequence of information. when i had it job at the dairy at graduate school there were 10 steps for setting up the dairy equipment. if i do not have the list would be in trouble i would have to make my own little list and then a very precise diagnosis was greenspan's with university of pittsburgh thank you to the defense department for the funding of originally for head injuries and they looked at the circuit in my brain for speech and what i see and my circuit has greatly reduced bandwidth and that explains why i had trouble getting speech ou

another seat of fear in the brain is this almond shaped stcture called the amygdala. brain of a psychopath and according to his studies the blue areas shrink in psychopaths and it makes the area dramatically smaller. this part of the brain is very much involved in fear conditioning. you experience when you are thinking of doing something that's not rightnd then you get that awful feeling, no, i shouldn't do that. then that individual is more likely to perpetrate a horrific act like boston bombings. >> myriend dr. gupta joins me now. yesterday we reported the arrest of three schoolmates of dzhokhar tsarnaev all three 19 years old, two now stand accused of obstruction of justice the other of lying to the feds. as with the two alleged bombers we can't get into the minds of these guys but is there anything to be gleaned from their ages, 19 years old? >> i think there could be. we talked to adrian raines about that as well. a couple things to point out quickly there is an area of the brain that is sort of the frontal lobe area that is responsible for judgment. that's relev

i found out that my fears center, the amygdala the brain sphere center was larger and that would explain why i had so much anxiety problems. terrible anxiety problems. that is not controlled with antidepressant medication. there are a lot of people that are super anxious. we are a little bit of antidepressant can really help with a lot of the scans that turned man was a scan done in 2006 and scientists at the university of pittsburgh and carnegie mellon found i had a great take huge visual track. that would explain my visual thinking. then i found out that my math department -- because i have cerebral spinal fluid in my left cortex so that trashed out multitasking. one of the things i can't do is i can't remember long sequences of information. when i was in graduate school there were 10 steps for setting up. dari: equipment for milking the cows and to have them written on the list. if i didn't have that list i would have been in a lot of trouble and would have had to make my own list. seeing all those brain scans was really interesting and in the future we will be able to do precise diag