Why Some People React More Emotionally To Life’s Ups and Downs

So maybe your doctor could test for this to see if this would make you more susceptible to PTSD. And provide protocols to prevent that from happening.
http://www.spring.org.uk/2015/05/why-some-people-react-more-emotionally-to-lifes-ups-and-downs.php?utm_source=PsyBlog
Professor Rebecca Todd who led the study, said:

“People really do see the world differently.
For people with this gene variation, the emotionally relevant things in the world stand out much more.”

The gene is called ADRA2b and it regulates the neurotransmitter norepinephrine