Although blood doesn’t affect some people at all, it does affect others. Does it bother you so much that you faint?

Bride, Let’s give the answer.

About 15% of people faint at the sight of blood, while 4% injuries that cause bloodshed turn into a phobia.

According to researchers, the essence of these faints is that blood pressure rises quickly and then falls. A fear that they believe is caused There is. A sudden drop in blood pressure causes blood to be withdrawn from the brain, causing people to faint.

High blood pressure is essentially a normal condition and can occur in times of real or perceived danger. fight or flight response of the sympathetic nervous system is part of it.

Furthermore, the solitary tract nucleus (NST) of the brain acts as an internal toggle switch.

NST switches between sympathetic response and parasympathetic response and thus Communication with the vagus nerve is chaotic takes. The solitary core of the brain tries to do both at the same time. In other words, it increases heart rate while lowering blood pressure.

As a result, blood is pumped away from the brain and loss of consciousness becomes inevitable.

Another possibility is that the brain’s NST switches very quickly between sympathetic and parasympathetic responses, causing the body to temporarily fainting and closing is the reason.

Furthermore, researchers found that NST is responsible for the disgust response. a mixture of disgust and fear They think it will get complicated and cause fainting.

In summary, the reason why some people faint when they see blood is the lonely core of the brain. Many causes associated with (NST) There is.

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