by GilmoreGirl » 07 Dec 2016, 15:43
It's funny because in physiological terms, our reaction is entirely evolutionary. Like when an antelope is chased by a tiger - the antelope is undergoing a typical flight response - it's whole body works to protect it. Blood vessels in the extremities constrict to fuel more blood to the internal organs (including the gut!) so that if they get their tail bitten off or whatever there will be less immediate damage and more chance of escape. Also, muscles in the gut will contract, often causing defecation, maybe to help deter predators or make the animal lighter to help escape (several theories on why this is - but the matter of the fact is the body's flight response causes a hormonal cascade that acts directly on the gut).
It's funny to me because my father and I are typical "flight" type individuals - high anxiety, with many physical reactions to stress. Not only have I had ibs, but also full body burning rashes that every doctor I saw said was due to stress. Unlike us, my mother is completely "fight" type - she tackles every problem head on and has an iron stomach. Nothing phases her.
It can also come back to the idea of whether we have a dominant parasympathetic or sympathetic autonomic nervous systems - if the sympathetic (flight!) nervous system is in overdrive, we can have these types of physical reactions from seemingly everyday stressors.
Anyways sorry for the rant, just thought I'd chip in my neuroscience knowledge