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First Britain's future we will be looking at is a retailer in brain.
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It's located deep inside the skull.
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It's the home of our individual survival instincts and is responsible to deal with life threatening
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situations not to be technically correct.
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It works closely together with the limbic amygdala which is located in the next brain search and Colvert
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in the next lecture.
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The term reptilian brain refers to the Iranians believe that we inherited this part of the brain from
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our reptilian ancestors.
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Now this is incorrect.
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However as amphibians and fish also share this part of the brain we most probably have to go back to
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our common evolutionary ancestor of all vertebrates.
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The other thing with the reptilian denomination is that this part of the brain is only concern is its
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own individual survival.
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Now I know I know it's unfortunate just to name one some crocodiles take care of their offspring by
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letting them hide in their mouth for all these reasons.
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This part of the brain is sometimes also referred to as the primitive brain.
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Anyway just to be clear we do not have an actual reptilian brain in our head.
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It's an image being used here.
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Good.
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So the reptilian brain has three and only three ways of responding to a threat.
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You're probably already familiar with the famous fight or flight response.
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Actually there is one more flight fight freeze.
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So back in the stone age when a caveman would notice his being followed by a pack of hungry wolves.
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Three things would happen.
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The first strategy our caveman would try to run a thing with wolves is that they are pretty fast our
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legs may be longer but they got four of them so our running them is pretty much impossible.
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Second option for cave caveman is to fight them off.
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If the danger is not too strong this could work actually.
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Sometimes it's enough to intimidate by making ourselves look bigger making much noise throwing stuff
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around.
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Unfortunately we're in the stone age so much more than sticks and stones won't be available and the
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walls while there are a lot of them they got claws and sharp teeth and strong jaws.
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The odds are definitely not looking good.
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Last but not least our caveman can freeze.
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This means he makes himself as small as possible so the thread won't see him or won't find him interesting
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enough as lunch.
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The best survival option for our Gavyn though would have been to find a big tree and climb up there
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hoping the walls would tire and eventually walk away.
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So here we are thirty thousand years later and there aren't that many packs of wolves or any other hungry
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predators for that matter.
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Running around in our big cities or even in the countryside it's so great.
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No more need for the reptilian brain.
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Well not quite.
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In our modern lives the reptilian brain still gets activated in situations of life or death.
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Even if these are quite few if you're crossing the street and a car comes right at you you will have
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the same instinctive reaction as our caveman.
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The first reaction is to jump away or flight in the second face.
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You might consider stopping the car with both your hands like Superman does.
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However that might not work.
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The third reaction is to freeze like a rabbit caught in the spotlight at night.
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You'll just stop moving altogether if you're lucky the car might miss you.
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Bird our reptilian brain also gets activated when our live is not in danger.
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And that ladies and gentlemen is what today we call stress.
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Stress is a defense mechanism to a perceived danger.
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Now I didn't say danger I said perceived danger because humans are probably the only species capable
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of worrying for something that might never happen anyway so when we feel stressed we actually still
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use those same three strategies as our friend the caveman.
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The flying becomes anxiety.
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Ever felt nervous before a test or when you had to give a presentation that is a free stress fighting
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becomes aggressivity.
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Ever came home after a nerve wracking day at the office and you started shouting at the kids or your
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partner over something trivial.
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That is the stress and action.
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Finally the free stress becomes helplessness and I faced this daunting task where you didn't even know
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where to begin.
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Only thinking about it made you feel depressed.
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Well that is the free stress.
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So to summarize the reptilian brain this brain structure is responsible for our individual survival
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instincts.
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When activated we feel stress which can take three forms.
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Flight fight or freeze or translated in our modern world.
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Anxiety aggressivity helplessness.
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