The UP host "Wu Wuliu" on Bilibili uploaded a video mainly commemorating his deceased grandmother, and what surprised people was that this UP host used AI technology to "resurrect" her deceased grandmother through virtual digital humans.However, Mask, the founder of SpaceX in the United States, is a typical technology maniac

The UP host "Wu Wuliu" on Bilibili uploaded a video mainly commemorating his deceased grandmother, and what surprised people was that this UP host used AI technology to "resurrect" her deceased grandmother through virtual digital humans.

However, Mask, the founder of SpaceX in the United States, is a typical technology maniac. He used animals to conduct "brain machine experiments", which was opposed by scientists and animal protectionists because of certain damage to animals. However, Mask did not stop exploring. Last year, he even said that he had uploaded his Mind uploading to the computer cloud, realizing communication with "another self".

What is human consciousness? What form does it exist in? And where have these consciousnesses gone after a person dies?

Unlike the plot in TV dramas, in real life, people do not die with their eyes closed or their legs kicked, it is a gradual process.

Firstly, the period of near deathThat is, the dying state. The duration varies from a few seconds to a few hours depending on individual differences. However, the dying period of young and strong people is generally longer than that of old and weak people, and the dying period of chronic diseases is also longer. The dying period of deaths such as acute death, heart stab injury, and severe intracranial injury is short or directly enters the Clinical death period. The function of the central nervous system above the brainstem in the dying human body will be lost or deeply suppressed, thusBlurred or disappeared consciousness, slow reaction, weakened or even delayed reflexes, weakened heartbeat, weak breathing, and decreased blood pressure.

SecondlyClinical death stageClinical death stageIndividual death or bodily deathAt this point, the central nervous system function further deteriorates and enters a deep coma, resulting in complete disappearance of autonomous activity and various reflexes,MydriasisClinical death stage4-6minClinical death stage

FinallyTotal death period, this isbrain deathThe last stage of death, also known as cell or molecular death, belongs to the final stage of the death process. At this point, the central nervous system has undergone irreversible changes and its function has permanently stopped,Organ metabolism stops and body function cannot be reversed.

The United States once conducted a study on cardiac arrest. Dr. Sampania interviewed over 100 survivors of over 2000 cardiac arrest events and found that,Survivors of cardiac arrest can accurately describe what happens around them when their heart stops beating.

Sampania believes that,As long as a person's brainstem is not dead, they still have consciousnessYou can hear the sounds around you,The conscious duration is approximately 6 minutes.

Consciousness seems to be an elusive thing, but it is also an important and magical function of the brain. So where will consciousness go after death?

On March 27 this year, Song Xuejun's team from Southern University of Science and Technology published a related research paper in the international journal NatureNeuroscience, which pointed out thatThe recovery of consciousness is not passive, but an active processAt the same time, it also reveals the molecular neural mechanism of conscious active restart.

Human beings and all higher animals have consciousness of perception, cognition, and other aspects. Simply put, consciousness is a summary of the concept of human imagination of advanced neuropsychological activities, which is essentially the highly and orderly biochemical activities of the neural centers in the cerebral cortex.

And when a person dies and their nerves stop working, consciousness naturally disappears.

Nowadays,Artificial neurons have been born, with the hope of becoming a continuation of consciousness. What is an artificial neuron?

A basic pattern of artificial neurons isSimulate the main working modes of biological neurons through FormulaThe working process of a multi-layer artificial neuron system is actually a summary process of external input characteristics.

What exactly happens to the body after a person dies? Is it the same as what is portrayed on TV, where the body turns white and bleeds through seven holes? Next, we will reveal the process of changes in the body for everyone.

In the first stage after death, within 15-25 minutes after death, the body becomes pale. The reason why the body is pale is due to the cessation of microvascular circulation after death and the influence of gravity. Especially for bodies with already light skin color, the skin becomes even whiter.

Corpse cold

To put it simply, the corpse slowly cools after death. The reason why the corpse cools is that the human body is a Warm-blooded, but metabolism and heat production will stop after death. Natural heat dissipation will reduce the body temperature to the ambient temperature. commonlySpecifically, it will also be affected by the deceased's physical condition, cause of death, environmental temperature, and other factorsThe end time of corpse cooling usually takes 5-10 hoursIn cold weather, the cooling rate will be reduced to 1 hour.

Within 1-3 hours after death, muscles will gradually become stiff and stiff, and joints will become fixed and difficult to move. From 4-6 hours after death, symptoms of stiffness will spread from the local area to the whole bodyCorpse stiffness usually takes 24-48 hours or more before it begins to alleviateIt will not be completely relieved until the 3rd to 7th day.

In the second place after deathWithin 1-2 hoursBlood begins to deposit due to the action of gravity, leading to localized deposition, this isAs the time of death continues to retire, the range of necrotic plaques will also expand and the color will continue to deepen, and forensic doctors can also preliminarily determine the cause of death of patients based on the color of necrotic plaques.

After the corpse goes through this stage, there will also be a large number of decaying bacteria breeding, and the soft tissues of the body will begin to decompose and disappear under the action of the bacteria,About a year after death, soft tissues such as skin and muscles will be completely decomposedFinally, the white forest skeleton was exposed, andThe skeleton can be preserved intact for thousands of years.

Everyone thinks that the work of forensic medicine is very mysterious and challenging, and they start from theory, go from concrete to practical, and use scientific language. It is also because they have a clear understanding of the process of body changes that they can accurately determine the time of death of the deceased.

If one day a child asks you questions about death such as "how do people die" and "where do people go after death", will you tell them the truth? Our traditional thinking holds that death is terrifying, especially when it comes to educating children. It often blurs the concept of death, which can lead to a lack of reverence for life or extreme fear of death. In fact, as adults, we should teach children how to face death, which also determines how they face life. Only with correct life and death education can children improve their personality development.

References:

[1] How Does Human Death Happen Step by Step? "Tencent Medical Dictionary, 2022-04-05

[2] Why Do Humans Have Consciousness? What is the Essence of Human Thinking? "Cosmic Exploration, 2023-03-12

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