Why does staring at my armpit make me feel faint?

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Offline thedoc

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Ross Hetherington asked the Naked Scientists:
   
Why is it that when you look at your underarm do you start to feel faint and would faint if you continue over a prolonged period?
What do you think?
« Last Edit: 06/06/2014 07:30:02 by _system »

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Offline RD

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Re: Why does staring at my armpit make me feel faint?
« Reply #1 on: 06/06/2014 07:48:49 »
excluding the smell :)

The combination of raising your arm and twisting your neck could reduce the bloodflow to your brain by compressing the arteries in your neck ...

http://en.wikipedia.org/wiki/Subclavian_artery#Branches
« Last Edit: 06/06/2014 08:00:37 by RD »

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Offline syhprum

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Re: Why does staring at my armpit make me feel faint?
« Reply #2 on: 06/06/2014 12:30:33 »
I have the same problem if I crank my head back to look at something high up, when I climb a ladder I have to be sure to keep looking down and tie myself on if I am working (also the same problem using the maximum acceleration of my car).
syhprum