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Anonymous users2024-02-12The number of neurons in the human brain can reach 100 billion, synapses formed between neurons.
It can reach 100 trillion of them, and it is because of them that the human brain has the data processing power comparable to that of a computer.
In the past, the number of neurons in the brain was only an estimate, but some scientists have carefully calculated it in an ingenious way. Cell membranes of neurons.
Unlike the membrane properties of the nucleus, the cell membrane can be destroyed by using a certain cellular fuel, but the nuclear membrane.
However, it can be retained, the suspension of the nucleus can be made, the neurons are evenly distributed in the solution by stirring thoroughly, and then the number of nuclei in each field of view can be counted with a microscope, the number of nuclei in each drop of suspension can be calculated, and finally the number of nuclei contained in the whole brain can be obtained.
Through this method, scientists learned that the number of neurons in the human brain is about 860, just the cerebral cortex.
Species contain 1-20 billion neurons. It was also found that compared to human neurons, other primates.
Brain neurons are larger and contain fewer neurons per unit mass, so it is inferred that large animals need to balance the nutrients consumed by the brain and the body follow a certain law, and the larger the body, the more energy is consumed in the body, but the less nutrients are supplied to the brain, which is not conducive to the evolution of the brain.
The human body is not too large, the body consumes relatively less energy, and the eating habit of eating cooked food allows the human stomach to digest food better.
Obtaining sufficient nutrients, and having more time to think, countless flashes of inspiration have brought about the deepening of human understanding of nature, and the developed brain also helps human beings to analyze nature, and can also enable human beings to retain knowledge in the brain and teach it to future generations as a valuable experience, passing it down from generation to generation, and quantitative changes produce qualitative changes, human civilization.
Rapid development. However, the development of science is never-ending, and there are still many things in our lives that cannot be explained by science for the time being, and more convenient calculation methods may appear in the future.
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Anonymous users2024-02-11The number of neurons is calculated by scientists based on the number of neurons observed per unit mass of the brain, after calculating the average number of neurons per unit of mass and multiplying it by the total mass of the brain to obtain about 100 billion data.
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Anonymous users2024-02-10A brain slice is analyzed and then the total number can be obtained based on the volume of the slice and the total volume of the brain.
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Anonymous users2024-02-09The figure of 100 billion is calculated by analyzing the structure of the brain and the complexity of each functional area, but the error is still very large.
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Anonymous users2024-02-08The human brain has about 10 billion neurons. （）
a.Justification and confirmation.
b.Confusion and misdetection.
Correct Boom Tomato Answer: B
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Anonymous users2024-02-07Because the brain is not a computer in the first place.
The brain does not remember things with a lot of detail, such as photographs, it usually only remembers the characteristics of things. What is the characteristic, is the color, taste, line, ......Even emotions and time, the general framework for remembering things outside of the characteristics. When you recall something, only the characteristics are obvious, and there are no details or the wrong details are in mind.
You can forcibly memorize the details of an event, but this is short-term memory and requires you to repeat the process over and over again.
The brain is not as fast as a computer, but the brain is multi-threaded. When the brain processes various types of information, it directly compares multi-category characteristics, and the matching degree of these characteristics is often linked to the concepts in the language, forming an overall understanding of the received information. When compared to the stored framework, the brain can easily associate many concepts with similar properties.
The consciousness then actively processes and analyzes the information for learning and creative activities.
The brain's key associative function is not a logical process, it is only concerned with similar features, regardless of the framework or concept to which they belong. Such a feature allows the human mind to run wild.
These are my personal understandings, not theories, so just take a look.
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Anonymous users2024-02-06Because the human brain has undergone a genetic mutation in the evolutionary process, this gene is called "arhgap11b", which helps basal brain stem cells to reproduce, so the human brain has a wider cortex and more and more neurons.
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Anonymous users2024-02-05Because human beings are constantly thinking in the process of evolution, the brain capacity has been exercised. Because thinking requires the mobilization of neurons, the number of neurons also increases.
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Anonymous users2024-02-04The reason why the human brain is so large is the result of human evolution. Having so many neurons is to regulate the body and better control the coordination of the various joints of the body!
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Anonymous users2024-02-03The human brain is homogeneous and contaminated, with scientists as the standard
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Anonymous users2024-02-02It's not just one percent.
Although the 10 billion neurons of the human brain are not all active at the same time, inactivity does not mean that it is stationary, let alone "undeveloped", and the brain is clearly divided into functions, and each part is functioning and functioning, maintaining the functions of the individual.
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Anonymous users2024-02-01Because the human brain is constantly evolving, the current brain cells are enough, and they may gradually increase in the future.
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Anonymous users2024-01-31Because most of the brain cells, we simply can't use them completely, and these nerve cells are being replaced every day.
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Anonymous users2024-01-30According to scientists, the human brain is home to a staggering 86 billion neurons, and each cell has several connections in every possible direction, forming a super-giant honeycomb. Using algebraic topology, scientists were able to model in a virtual brain, producing the effect of a multidimensional universe with the help of a computer.
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Anonymous users2024-01-29Through the human brain, there are 10 billion nerve cells, and the number of human brain-level cells can be known;
By recording 86 million times of information per day, it can be seen that the daily record of information is 80 million times;
By producing 100,000 chemical reactions in 1 second, we can know the number of chemical reactions per second;
Through the five senses of the human being, all the time to capture all kinds of information, but after the brain processing, only 1% of the actual information, the remaining 99% are more than into the "cold palace", it can be known that the brain processed the actual information of 1%, the remaining 99% of the non-processing
The myelin sheath is important because it provides nutrients for the growth of neurons, and allows for more precise conduction of nerve impulses and a more defined path (imagine why the wire is covered with a wire jacket to prevent short circuits). >>>More
Motor neuron disease (MND) is a group of chronic, progressive neurodegenerative diseases of the anterior horn cells of the spinal cord, motor neurons of the brainstem, pyramidal cells of the cortex, and pyramidal tract of the spinal cord with an unspecified choice. The incidence is about 13.1 million per year and the prevalence is 48.1 million per year. Since most patients die within 3 to 5 years of symptom onset, the prevalence of the disease is relatively close to the incidence. >>>More
Three causes of motor neuron disease.
1. Genetic factorsGenetic factors are a typical cause of motor neuron disease, because the incidence of this disease itself is very low, and after statistics, 5% to 10% of people suffer from this disease because of family inheritance, so genetic factors cannot be ignored. >>>More
Western medicine believes that MND is a progressive chronic neurological pathology, which is more likely to invade the anterior horn cells of the spinal cord, the motor nerve nucleus of the brainstem, the cerebral cortex and the pyramidal tract, so patients often have symptoms such as muscle weakness, muscle atrophy, muscle beating and increased muscle tone. The specific manifestations of the lower limbs are weakness in walking, unsteadiness, easy to fall or procrastination; The specific manifestations of the upper limbs are inflexible fingers and slow movements. In addition, a small percentage of patients present with dysphagia, speech dysfunction, or breathing disorders. >>>More
This can be conditioned by using traditional Chinese medicine, but it cannot be cured, only to alleviate the condition, because there is no cure for this disease.