Why can t you open your eyes when you sneeze, and can you open your eyes when you sneeze?

Sneezing is a defensive breathing reflex of the human body, which starts with a deep inhalation, and then the diaphragm suddenly contracts, producing a rapid and powerful exhalation action, at this time, the person will open the mouth wide, a breath of air rushes out of the mouth and nose, and then the person will sneeze.

On the one hand, when sneezing, it is necessary to use a lot of force to expel the gas, and there is a lot of pressure in the lungs, mouth, and nasal cavity, not only the respiratory muscles such as the diaphragm and intercostal muscles must suddenly contract violently, but also the muscles of the neck, face, and forehead will be tense, and the orbicularis oculi muscle, which innervates the closed eyes, will also contract, because it is innervated by the facial nerve with the facial muscles, so it will involuntarily close the eyes. On the other hand, the nervous system needs to be highly concentrated when sneezing, in order to complete a series of reflexes of sneezing, closing the eyes, can reduce external interference, sometimes want to sneeze, it happens that someone talks to you or pats you, it is likely that the sneeze will not be able to hit.

It is also said that when you open your eyes and sneeze, your eyeballs may come out, which is terrible...

This is an unconditioned reflex of the human body. When sneezing, blood pressure and cranial pressure are very high, and the physiological significance of closing the eyes tightly is to prevent the eyeballs from bursting or pressing out.

I had just sneezed and intentionally squinted and felt a tingling in my eyeballs. Afraid.

Closing one's eyes when sneezing is an instinctive reaction that people can't control, so they can effectively ensure that their vision is not damaged.

In fact, it is really impossible to open your eyes when you sneeze, because when people sneeze, they will form an impact, and this impact is very large. After research, it was found that when a person sneezes, the muscles of the face will contract, and this contraction process is not controlled by the human brain, but caused by the natural conditioned reflex of the person. When a person's facial muscles contract, the person's eyes naturally close.

Earlier I mentioned that when you sneeze, you need to create an impact force, and this impact force is mainly used to eject foreign objects from the nostrils. When a person sneezes, the speed of the rapids that erupts from the nostrils can reach 150 kilometers per hour. In the face of this powerful impact, people will naturally react instinctively, that is, close their eyes tightly.

If you don't close your eyes tightly when sneezing, the pressure caused by the sneeze can cause serious damage to the lacrimal ducts and even damage the optic nerve.

The human eyelid closure is mainly completed by the annular orbicularis oculi and the fan-like distribution of the upper facial muscle, and the instruction to close the eye is sent by the human brain, and then the orbicularis oculi muscle contraction is controlled through the nerve, so that the eyelids can be closed. Conversely, if the human brain gives a command to contract the upper facial muscles, then the human eyelids will open.

Can you open your eyes when you sneeze, these studies tell you.

The opening and closing of the eyelids are mainly accomplished by the annular orbicularis oculi muscle and the levator palpebrae superioris muscle, which is fan-shaped. When the eyes need to be closed, the brain sends a command, and the orbicularis oculi muscle is controlled by nerve conduction to contract, and the eyelids are closed; Conversely, the brain innervates the levator palpebrae muscle contraction, the orbicularis oculi muscle relaxes, and the eyelids open. When sneezing, it is necessary to use a lot of force to expel gas, and there is a lot of pressure in the lungs, mouth, and nasal cavity, which can make the air flow reach a speed of 160 kilometers per hour, and can be sprayed up to meters away!

If you sneeze with your eyes open, the pressure of the sneeze can seriously injure the lacrimal duct and even trauma the optic nerve.

So, in order to protect the fragile eye, our brains have formed this instinctive response over the course of long-term evolution.

Because the air pressure from the respiratory tract at the moment of sneezing is equivalent to that of a jet, due to inertia, the person's head will rush forward to maintain balance, and if you don't close your eyes, your eyes will be thrown out entirely, so the person's conditioned reflex determines that the person will close his eyes when he sneezes.

If you sneeze too hard, your eyeballs and trachea will communicate, and it will be easy to fall out.