Research shows hypoxia & other blood flow changes when we're stressed that make us alert for danger

Psychologists from the University of Sussex, England, put volunteers under unexpected stress and using thermal imaging cameras have shown that when this happens blood flow is reduced to our noses. In the research it showed that nose temperature dropped 3 to 6 degrees as the nervous system pushes blood flow away from the nose to the eyes and ears - a physical reaction to help us to look and listen for danger.

I think it particularly interesting that the stress in the experiments was not dangerous or life threatening but the brain evidently treated it as such and/or prepped and made the participants be alert and on the look out for danger.

I wondered though if the flushing away from the nose may have been (at least in part) due to embarrassment (i.e., the volunteers were feeling embarrassed because they knew that they would find it hard to keep subtracting 17 from a starting point of 2023 and would be liable to make mistakes) but it also happened when the volunteers were asked to do something that was likely to feel more stressful than embarrassing, i.e. to make a pitch for their ideal job.

Here's the BBC news article about it, which contains a video showing the journalist's nose temperature drop happening when the test was done on her...

https://www.bbc.co.uk/news/articles/cj076ynnlpgo (Thermal cameras read stress on my face)

I posted this up because if one lives in a chronic state of being under and subject to stress and seeing emotions as dangerous, hypoxia is likely to be going on much of the time, which is Sarno-esque (what with his view that hypoxia could be responsible for pain and other symptoms).