Brain wave interpretation, the signal of brain waves

Modern technology has not yet reached the level of being able to interpret the privacy of an individual's mind through brain waves, and I am afraid it will be another hundred years. Don't overestimate the capabilities of science and technology, especially in the field of brain science.

At present, all that can be done is to know the strength of physiological activity related to a certain part of the brain through brain waves.

It is very likely that the brain computer emitted by people when thinking must be different, just like the sound can be transmitted and converted through ** is the same reason, but this is not terrible, the brain likes to think crankily that brain waves are just machines, and there is really such a device that ordinary people can't use!

There is a big difference between research and practice, for example, some people have long said that they can study ** cancer, but now people still die of cancer every day.

What you are talking about is only a certain aspect of the brainwave, just a very simple brainwave signal, complex is not analytical, if you are interested in this aspect, it is recommended to look at the brainwave principle first.

1. Brain waves are a method of recording brain activity using electrophysiological indicators, and the postsynaptic potential of a large number of neurons is formed after the sum of the synchronous occurrence of a large number of neurons when the brain is active. It records changes in electrical waves during brain activity and is the overall reflection of the electrophysiological activity of brain nerve cells on the surface of the cerebral cortex or scalp. Brain waves** at the postsynaptic potential of the dendrites at the apical cone cells.

The formation of brainwave synchrony rhythms is also associated with the activity of non-specific projection systems in the corticothalamus.

2. Findings: The research team was inspired by machine translation and trained a recurrent neural network. In the study, four volunteers were asked to repeat 30 to 50 sentences aloud.

They have a large number of microelectrodes in the lateral cortex of their brains that can monitor the corresponding neural activity in the brain. After this brainwave data is fed into the AI system, it is first encoded into a sequence and then decoded into corresponding English sentences.

3. Band division: Modern scientific research has shown that the human brain will produce spontaneous electrophysiological activity when working, which can be manifested in the form of brain waves through a special EEG recorder, and there are at least four important bands in EEG research.

4. Functional research: In the field of education and entertainment, EEG signals can be used to control the game and train the ability to control attention, and in the field of artificial intelligence, EEG signals can be used to control intelligent wheelchairs and car central control systems.

There are four types of brain waves: alpha, beta, δ delta, and theta.

What are brain waves

Scientific studies have shown that our brain is composed of 100 million nerve cells and glial cells, and brain cells will constantly send out energy and subtle electrical pulsations when they are constantly scanning and receiving various signals inside and outside the body and responding, thus forming fluctuations, which are called brain waves.

Different brain waves play different roles in regulating our body and mind. At present, the International Association of Brain Waves divides brain waves into four bands: alpha waves, beta waves, hita waves, and daita waves according to the different vibration frequencies of brain waves.

Alfarbo) frequency: 8 - 13 Hz.

State: Relaxed state, the brain is awake and relaxed, easy to concentrate on learning, work is not easy to be disturbed by external things, and the brain is not easy to get tired.

Beta) frequency: 14 Hz or more.

Hitabo) frequency: 4 - 7 Hz.

State: Deep relaxation, high concentration, inspiration, creativity.

Frequency: 3 Hz or less.

Status: Sleep state.

The sound of the singing bowl is an alphabo.

8——13hz

1 Pinyin 2 Conditions for the production of EEG rhythmic activity.

3 Cortical neuronal mechanisms of EEG activity.

4 The origin of rhythmic synchronous activity of cortical neurons.

nǎo diàn bō

The electric field in the brain must be strong in order to record potential changes on the surface of the scalp, and two conditions must be met for the electric field in the brain to be quite strong:

1) Synchronization. The cerebral cortex is made up of more than 10 billion neurons, and the electrical potentials recorded from the surface of the cortex are the sum of the electric fields generated by the activity of many neurons. Therefore, rhythmic brain waves are the result of the simultaneous activity and simultaneous inhibition of many neurons.

Only in this way can the amplitude of the sum be larger, otherwise they will cancel each other out, and even the potential change will not be recorded. This process of simultaneous discharge or simultaneous suppression is called "synchronization". If, for some reason, neurons cannot be fired or suppressed at the same time, it is "desynchronized".

Synchronization includes the same frequency and phase. Otherwise, if two neurons emit the same frequency but opposite each other, there will still be no large amplitude. In general, the greater the degree of synchronization, the greater the amplitude and the lower the frequency; Conversely, the greater the degree of desynchronization, the smaller the amplitude and the higher the frequency.

2) Neurons are arranged in the same direction. If the direction of the neurons is not the same, the direction of impulse conduction will not be the same, and the electric field generated will cancel each other out, and a strong electric field cannot be formed. The pyramidal cells of the cerebral cortex are very neatly arranged, and their apical dendrites extend to the surface of the cortex, so the formation of brain waves is most likely due to the transmission of electrical potentials from many pyramidal cells from the cell body to the surface of the cortex.

When these pyramidal cells are engaged in synchronous activity, a strong electric field is generated that can be recorded on the surface of the cortex.

Since the most common brain wave rhythm is about 10 beats per second, and the period of each wave is about 100 mm, which is much slower than the action potential of neurons, and the time course of the postsynaptic potential of neurons is more similar, it is proposed that brain waves are caused by the synchronous slow activity of neurons. In addition, animal experiments have shown that when microelectrodes are inserted into cortical neurons in cats, it is found that the slow postsynaptic potential of cortical neurons recorded by microelectrodes is often the same as the synchronized brain wave time period recorded by coarse electrodes on the cortical surface, especially at 8 12 spindle waves per second. In addition, when the fast-acting barbiturate is injected intravenously, the brain waves and the postsynaptic potential recorded in the cells disappear at the same time, and when the drug is done, both are restored at the same time.

Therefore, it can be assumed that brain waves are formed by the sum of postsynaptic potentials (including excitatory postsynaptic potentials and inhibitory postsynaptic potentials) when cortical cell populations are synchronized.