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Surely people that get pleasure out of asphyxiation would not have the same ability so survive as those who do not, some migth even intentionally asphyxiate themselves. Or is this a scenario when enough time hasn't passed for the gene to evolve away?

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Evolution works at the population level to ensure genes get passed down to the next generation. The deadly genetic causes of asphyxiations as children have already been selected out.

As a general note, evolution has no goals and doesn't guarantee "better" over time.

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The signal is the same; it’s the starting and ending points that differ.

The touch activates local sensory neurons, which generate an action potential. This signal is transferred to the somatosensory cortex of the brain (soma = body, literally the body sensing part of the brain). There is point-for-point correspondence of each area of the body to specific points on the somatosensory cortex. This is called somatotopy, and is how the brain knows which part of the body is being touched.

Read about it here.

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It happened to me all the time when I was falling asleep, used to give me so much panic and anxiety.

Hey! I'm a doctor and a biochem nerd. Your blood pH is buffered by multiple systems, primarily bicarbonate, as well as lactate and phosphate compounds. That means that swings in the concentration of blood compounds (aspirin, or salicylic acid, for example, is an acid) don't cause significant changes. pH is also tightly controlled by your lungs and kidneys. Your lungs control the amount of CO2 in your blood, and therefore bicarb and carbonic acid content. Your kidneys also retain or excrete bicarb as needed. There are certain processes like lactic acid production, electrolyte abnormalities, and kidney or lung issues that can make you relatively acidic. However, a truly acidic pH of even slightly less than 7 is a pretty profound acidosis and likely life threatening.

If you don't stop arterial bleeding until after you've gotten through to the emergency service, then the person will bleed out 10-20 times.

Ps: You can realistically only bleed out 1 time....

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Yes, that’s what i was talking about. Very interesting, thanks !

Hey doctor who performs amputations, I'm an ER doctor who sees amputated feet. I've always wondered what goes into the decision of whether a part can be reattached. I remember on my trauma rotation the senior resident looked at an amputated foot for two seconds and then just casually threw it in the garbage. I'd be mad if that were my foot.

Thank you for the precision !

Interesting ! Thank you for the answer !

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Any blood caught at the end of the artery will just eddy and swirl until the vessel regresses or grows new connections. It may also clot and get eaten up. It's not a significant concern.

This is a great question! The short, unhelpful answer is do whatever you have to to stop the bleeding. It really depends on the injury as to whether pressure would be a good start. If it's bleeding a lot, put a tourniquet on it, we'll figure it out in the ED. And check out the Stop the Bleed campaign, ask your boss to host a class!

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