its been a long time
my mind was wandering as i was watching a rerun of something on VH1 last night. this is a usual occurance. the lulling sounds of webjunk20 are made into droning tones as my thoughts drowned them out. recently i have been thinking of these three things. feel free to add to the thought process
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Nervousness stems from evolutionary change. Humans have adapted past the point of having to run from predators, so nervousness/anxiety and the accompanying "adrenaline rush" are simply relics of a past life that lies only in our DNA. It was meant to heighten senses and abilities, but since we don't need those, we only experience the mental portion of it (when we are in setting like giving a speech). As far as blushing goes, blood vessels on your face dilate in response to the epinephrine (and actually vascular beds in the rest of your skeletal muscles dilate as well, which would increase your physical capabilities if you were exercising and not giving a speech).
Also, when one gets nervous, their body temperature increases and sweating is a compensatory mechanism for this. Epinephrine can also cause sweating directly.
The "freezing" is an involuntary muscle contraction, during which the sympathetic system is kicked into high gear. In response to the epinephrine flooding the system, pupils and airways will dilate, heart rate and cardiac output will increase, hearing and smell become more sensitive, and most parasympathetic systems slow down. This occurs during that strange jerking motion we make when startled.
The other topics....well....You probably already know my views there. Ha.
Rico
PS- that was a helluva of a comment. Nice job on the entry.
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