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Our brain is visualized by brain imaging and cognitive psychology techniques.

Updated: May 29, 2022

Studying "Study of Consciousness" (Stanislas Duanne) can further deepen my understanding of coaching theory.

I am studying to add a unique flavour to coaching techniques, such as "unconscious rewriting."

This series of blog posts are my study notes. This time, the theme that follows the unconscious and conscious

I will write a "sign of consciousness".


Brain imaging technology has contributed to clarifying two points of practical skill.

  1. What kind of activity does the brain do when information reaches (recognizes) consciousness?

  2. How the conscious activity and the unconscious processing activity are different

Stanislas Duanne found four signs called "Signs of Consciousness".

[Sign of consciousness]

  • Sub-via stimuli propagate deep into the cortex but are strongly amplified by exceeding the awareness threshold.

  • The amplified stimulus information is transmitted to many areas, causing sudden neural circuits in the parietal lobe and prefrontal cortex.

  • (In the EEG, conscious access appears late as a slow EEG (1/3 second) called P3 wave)

  • High-frequency vibration that occurs with a delay occurs suddenly.

  • Synchronous information exchange occurs between distant brain regions.

We can stay inside our hearts and think freely about what we want, even during conversations.

Even when people around you talk to you and think you're talking to you, your mind can think differently.

Consciousness is a sanctuary that no one can invade.

For scientists, how to break into this fortress of the mind has long been a significant challenge.

Then, in 1990, when Japanese researchers such as Seiji Ogawa developed functional magnetic resonance imaging (fMRI), the inside of their heads became transparent.

f MRI utilizes the connections between cells and blood vessels in the brain as follows.

As neural circuit activity increases, neurons' glial cells detect increased synaptic activity.

  • Glial cells open the surrounding blood vessels to compensate for this increase in energy expenditure quickly.

  • After a few seconds, blood flow increases and more oxygen and glucose flow in the blood.

  • Increases the number of red blood cells that contain haemoglobin molecules that carry oxygen.

  • The main feature of fMRI is that it detects the physical properties of haemoglobin molecules at a distance.

Haemoglobin acts as a tiny magnet when it does not carry oxygen, but it does not act like a magnet when it carries oxygen. An fMRI machine is a large, tuned magnet designed to detect distortions in small magnetic fields that can indirectly see neural activity through haemoglobin in any part of the brain tissue.

fMRI can visualize human brain activity up to several times per second with millimetre resolution.

Although fMRI cannot track the time course of neuron firing, other techniques can now be used to accurately measure the time course of current at synapses without opening the skull.

The EEG was invented in the 1930s. It is now evolving into a technology that captures brain activity over the entire head with up to 256 electrodes and records it as digital information in milliseconds.

In the 1960s, a technology called Magnetoencephalography (MEG) appeared. Both EEG and MEG are devices that accurately record tiny magnetic waves.

EEG is a method of attaching a small conductor to the head, and MEG is placing a highly sensitive magnetic field detector around the head.

We can now use fMRI, EEG, and MEG to track how visual stimuli eventually reach the advanced frontal cortex from the retina, resulting in brain activation.

We can visualize Consciousness by using cognitive psychology techniques and devices such as fMRI, EEG, and MEG.

Various experimental methods stimulate the subjects, and the conscious and unconscious are compared.

for example,

  • Masking and inattentional blindness can be used to remove visual images from view.

  • It is possible to give a visual stimulus in the vicinity of the fight and make only the subjective awareness of it change.

The same visual stimulus can be visible in one trial and invisible in another.

All you have to do now is investigate how Consciousness causes changes in your brain.

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