Introduction
In this post, I will introduce four fundamental foundations of my research: the brain, what EEG is, and its applications.
1. Brain
From the system level perspective, the brain is organized into different parts with specific properties.
For better explanation i created this map.
2. The Electroencephalogram (EEG), Rhythms, and Waveforms
The combined electrical activity of the cerebral cortex is called a brain wave or rhythm. These signals change over time and often form repeating wave patterns. This happens because many brain cells (neurons) are active together.
When large groups of neurons work at the same time, they create an electrical signal strong enough to be measured from the scalp using EEG.
These brain waves can have different speeds (frequencies) and strengths (amplitudes).
EEG is very sensitive to changes in mental state. It can reflect many conditions, such as stress, alertness, calmness, deep rest, hypnosis, and sleep.
Think of a crowded football stadium. One person clapping is quiet, but when thousands of people clap together in rhythm, the sound becomes loud and clear.
EEG works in a similar way. A single neuron is too weak to measure, but when many neurons firetogether in a rhythm, their combined activity becomes strong enough to detect on the scalp.
3. EEG Recording Techniques
Electrodes collect signals from scalp. Amplifiers increase they very small signals so they can be measured correctly. They A/D(Analog to Digital) unit changes the signal from analog to digital form. The device then stores processes, or shows the recorded data.
Fast asynchronous control and robust non-control state detection - Sebastian Nagel
4. Application: Sleep and Circadian Rhythm Disorder Investigation
Different sleep disorders show different patterns in EEG signals. These patterns reflect how the brain behaves during various stages of sleep.
To properly study sleep disorders, it is important to track how sleep stages change over time. By measuring these changes in a clear and quantitative way, EEG helps reveal problems in sleep structure, timing, and quality.
This makes EEG a valuable tool for understanding how the brain moves between wakefulness, light sleep, deep sleep, and dreaming.
Final Thoughts
The brain performs many functions and procedures complex patterns of electrical activity. This ongoing process can be observed and studied using EEG.
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