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Researchers say this occurs and it is deep in the brain in the corecortex. researchers divided people in two groups, one average age 23 and one average age 68 and showed pictures of those who looked untrustworthy and put them in a mri brain. the areas of the cortex lit up like a warning signal when they were shown pictures of who looked untrustworthy and the older brain, nothing happened. it did not register. the lead reseracher says people as they able lose that "gut" feeling that something is wrong. >> if you are not getting that signal it is not figuring into your decisionmaking so you coul...

Ultra real world. >> evan alexander nervous a coma for a full week after he contracted a rare bacterial infection. his entire cortex was completely dead. his doctors talked about taking him off life support, and evan woke up. he believes he returned from another consciousness than he dreamed existed. he said it was heaven, but this time it's different. evan is actually dr. evan alexander, a harvard-trained brain surgeon. his scientific explanation is that he was actually in heaven up. dr. alexander is author of the new book "proof of heaven up. "t thank you for joins us. >> thank you for havin...

Someone but if you don't have brakes how do you stop the car? jamie: can it be stopped? dr. manny alvarez, senior managing editor of fox news health.com, a member of our fox news medical a team. >> good to see you,. jamie: doctor manny, what about addiction, did she point out anything we didn't already know. >> she is the director of the national institute of drug abuse. one of the greatest scientists in the world doing research many, many years on drug addiction. i think she is onto something because it is very important to realize drug addiction is not a character flaw, it is a real disease....

Balance of the sort of existed world. >> we're the only species that has a nervous system that can make us self-aware. and that gives us the unique advantage. who am i? what do i want? what's my purpose? what's my contribution? what do i -- how do i want to make a difference? how do i express myself? that actually causes physical changes in your preference cortex. biological organisms are fine tuned. it's not like you visualize our make hard intentions, you reflect. the ability to reflect is a very unique ability. and when you reflect and you live the question, life automatically moves you int...

Instance for planning what you want to do or for understanding where your body is in space. something like that. so that to give you an idea, somebody, for instance, may have some weakness on the right and they want to drink a cup of tea and they're sitting there looking at that cup of tea, and they're thinking how the heck am i going to get that tea into my mouth. the simpling at of picking it up and going like that. you need this primeau tore cortex to do. and so these are some of the possible kinds of issues that she'll be confronting as she works through physical speech and occupational th...