Death is something that everyone is afraid of, because it means that family, love, friendship, and all good memories will disappear, and oneself will sink into the darkness forever, which cannot be tolerated by any intelligent creature with free thinking and will. But even so, no matter how much we hate it, human beings cannot escape this fate. Therefore, the farewell before death became a solemn and solemn "ritual".
When a person is about to die, relatives and friends will come to see the deceased off and tell them that they are reluctant to leave the deceased. But when a person dies, can he still hear the movements outside? The traditional concept is that people will still have body temperature after death and hear the movements behind them, so elders will remind their children not to talk nonsense in this situation.
So, can a person who has just passed away really hear the voice of others? First of all, one can be sure that hearing is the last thing that disappears when a person dies.
Generally speaking, will lose vision first before dying , because the brain has a great demand for stereo vision, and a dying person cannot even open his eyes, so it is normal for him to lose vision first.
and then tactile . This is because at the last moment of life, the energy in the body will be concentrated on the brain, so the body temperature will drop and the perceptual nerves will lose consciousness.
Therefore, in the senses, the last thing that loses is hearing . The reason why people can hear all kinds of sounds is that the tympanic membrane vibrates in the ears, and the hair cells in the ears will turn these sounds into electronic signals and finally transmit them to the center of the brain.
Because the hearing system is very close to the brain, and its energy consumption is also very small in a very short time, it can still last until the end.
The hearing disappears at the end, so is there still hearing after death?
As mentioned earlier, the reason why people can hear sounds is because the hair cells in the ears send signals to the brain, and hearing can only be formed after the brain processes it. After a person dies, the brain will stop functioning. If there is no corresponding center to process it, then this signal will have no effect. In other words, if a person dies and does not process the signal, he will not have "hearing".
But, is that the truth? In fact, since humans used technology to explore this world, they have been constantly refreshing people's understanding of this world, and all of this is so jaw-dropping. The University of British Columbia in Canada conducted an experiment on "unconscious hearing after death" and found that people who died could still hear sounds outside, but it is unknown whether they could understand everything around them.
Researchers used a hat with 64 electrodes to monitor participants' brain activity. Healthy teens are first played with a series of music, then their brains are identified and recorded. In the process of monitoring near-death patients, researchers found that similar brain waves can be detected, whether conscious or unconscious.
That is to say, patients can still hear everything around them before they die, but they are not sure whether they can understand, because they will fall into a state of numbness before they die. Researchers believe that some people may hear their favorite music or some special sounds before they die, so they will not die and wait for the person they want to meet before they die.
You can know that people can hear the sounds around them when they just die, but how to judge whether a person dies?
In the era when medicine has not yet developed, people judge whether a person dies by examining whether he is still venting his anger. However, this method has great disadvantages, and it often causes the "dead" to "resurrect" from the coffin. In the era of relatively mature development of medicine, "heart death" has become a new criterion for determining death, that is, the heart will completely stop before the brain and breathe.The current "heart death" in my country is the main basis for judging death. Nowadays, with the increase of various cases, people have gradually realized that there are some disadvantages of "heart death", so they have begun to explore new criteria for judging death.
As we all know, the brain structure of the human body is very complex, but its main body is midbrain , cerebellar , brain stem , etc. Once the brain stem is irreversible, it will permanently lose function, leading to respiratory failure, and thus lead to hypoxia in the whole body organs. Therefore, " brain death " has gradually been included in a new indicator to evaluate whether a person dies.
However, everyone should know that people who have "heart death" can still hear sounds after death, and in a very short time, they will not hear "brain death". To sum up, when you are dying, you should be more cautious when speaking, so as not to regret leaving after his death.
