Question

I originally had planned to ask about whether there was anybiological truth in the popular phrase "shivering with fright".However, after doing a fair bit of googling it seems that there isa lot more medical reference to trembling as aresult of anxiety (1) (though I would imagine the distinction to befairly minor).

I was, after about an hour of fruitless searching, beginning towonder if it was a phenomenon created only in literature (such asbeing 'frozen by fright') rather than genuine human physiology,however then a website described how many people often have minortrembling before exams, interviews or other high pressuresituations - something I can attest to myself!

This hasn't really changed the biological purpose behind thequestion however - is there any advantage to shivering in a fightor flight situation or is it more a side effect of the release ofadrenaline or another chemical response? I am struggling because Ican only imagine it being a real disadvantage (consider for examplean organism hiding from a predator - uncontrolled movement in astressed situation can not be beneficial) so the only way that Ican see is that the shivering must be linked to something thatis a definite advantage in a high stresssituation. What would that be?